Base class for all UI-related nodes. [Control] features a bounding rectangle that defines its extents, an anchor position relative to its parent control or the current viewport, and offsets relative to the anchor. The offsets update automatically when the node, any of its parents, or the screen size change.
For more information on Godot's UI system, anchors, offsets, and containers, see the related tutorials in the manual. To build flexible UIs, you'll need a mix of UI elements that inherit from [Control] and [Container] nodes.
Godot sends input events to the scene's root node first, by calling [method Node._input]. [method Node._input] forwards the event down the node tree to the nodes under the mouse cursor, or on keyboard focus. To do so, it calls [code]MainLoop._input_event[/code].
[b]FIXME:[/b] No longer valid after DisplayServer split and Input refactoring.
Call [method accept_event] so no other node receives the event. Once you accept an input, it becomes handled so [method Node._unhandled_input] will not process it.
Only one [Control] node can be in keyboard focus. Only the node in focus will receive keyboard events. To get the focus, call [method grab_focus]. [Control] nodes lose focus when another node grabs it, or if you hide the node in focus.
Sets [member mouse_filter] to [constant MOUSE_FILTER_IGNORE] to tell a [Control] node to ignore mouse or touch events. You'll need it if you place an icon on top of a button.
[Theme] resources change the Control's appearance. If you change the [Theme] on a [Control] node, it affects all of its children. To override some of the theme's parameters, call one of the [code]add_theme_*_override[/code] methods, like [method add_theme_font_override]. You can override the theme with the inspector.
[b]Note:[/b] Theme items are [i]not[/i] [Object] properties. This means you can't access their values using [method Object.get] and [method Object.set]. Instead, use the [code]get_theme_*[/code] and [code]add_theme_*_override[/code] methods provided by this class.
Godot calls this method to test if [code]data[/code] from a control's [method _get_drag_data] can be dropped at [code]position[/code]. [code]position[/code] is local to this control.
This method should only be used to test the data. Process the data in [method _drop_data].
[codeblocks]
[gdscript]
func _can_drop_data(position, data):
# Check position if it is relevant to you
# Otherwise, just check data
return typeof(data) == TYPE_DICTIONARY and data.has("expected")
[/gdscript]
[csharp]
public override bool CanDropData(Vector2 position, object data)
{
// Check position if it is relevant to you
// Otherwise, just check data
return data is Godot.Collections.Dictionary && (data as Godot.Collections.Dictionary).Contains("expected");
}
[/csharp]
[/codeblocks]
</description>
</method>
<methodname="_drop_data"qualifiers="virtual">
<returntype="void">
</return>
<argumentindex="0"name="position"type="Vector2">
</argument>
<argumentindex="1"name="data"type="Variant">
</argument>
<description>
Godot calls this method to pass you the [code]data[/code] from a control's [method _get_drag_data] result. Godot first calls [method _can_drop_data] to test if [code]data[/code] is allowed to drop at [code]position[/code] where [code]position[/code] is local to this control.
[codeblocks]
[gdscript]
func _can_drop_data(position, data):
return typeof(data) == TYPE_DICTIONARY and data.has("color")
func _drop_data(position, data):
var color = data["color"]
[/gdscript]
[csharp]
public override bool CanDropData(Vector2 position, object data)
{
return data is Godot.Collections.Dictionary && (data as Godot.Collections.Dictionary).Contains("color");
}
public override void DropData(Vector2 position, object data)
{
Color color = (Color)(data as Godot.Collections.Dictionary)["color"];
}
[/csharp]
[/codeblocks]
</description>
</method>
<methodname="_get_drag_data"qualifiers="virtual">
<returntype="Variant">
</return>
<argumentindex="0"name="position"type="Vector2">
</argument>
<description>
Godot calls this method to get data that can be dragged and dropped onto controls that expect drop data. Returns [code]null[/code] if there is no data to drag. Controls that want to receive drop data should implement [method _can_drop_data] and [method _drop_data]. [code]position[/code] is local to this control. Drag may be forced with [method force_drag].
A preview that will follow the mouse that should represent the data can be set with [method set_drag_preview]. A good time to set the preview is in this method.
[codeblocks]
[gdscript]
func _get_drag_data(position):
var mydata = make_data() # This is your custom method generating the drag data.
set_drag_preview(make_preview(mydata)) # This is your custom method generating the preview of the drag data.
return mydata
[/gdscript]
[csharp]
public override object GetDragData(Vector2 position)
{
object mydata = MakeData(); // This is your custom method generating the drag data.
SetDragPreview(MakePreview(mydata)); // This is your custom method generating the preview of the drag data.
Virtual method to be implemented by the user. Returns the minimum size for this control. Alternative to [member rect_min_size] for controlling minimum size via code. The actual minimum size will be the max value of these two (in each axis separately).
Virtual method to be implemented by the user. Returns a [Control] node that should be used as a tooltip instead of the default one. The [code]for_text[/code] includes the contents of the [member hint_tooltip] property.
The returned node must be of type [Control] or Control-derived. It can have child nodes of any type. It is freed when the tooltip disappears, so make sure you always provide a new instance (if you want to use a pre-existing node from your scene tree, you can duplicate it and pass the duplicated instance). When [code]null[/code] or a non-Control node is returned, the default tooltip will be used instead.
The returned node will be added as child to a [PopupPanel], so you should only provide the contents of that panel. That [PopupPanel] can be themed using [method Theme.set_stylebox] for the type [code]"TooltipPanel"[/code] (see [member hint_tooltip] for an example).
[b]Note:[/b] The tooltip is shrunk to minimal size. If you want to ensure it's fully visible, you might want to set its [member rect_min_size] to some non-zero value.
[b]Note:[/b] The node (and any relevant children) should be [member CanvasItem.visible] when returned, otherwise, the viewport that instantiates it will not be able to calculate its minimum size reliably.
Return [code]Array[/code] of [code]Vector2i[/code] text ranges, in the left-to-right order. Ranges should cover full source [code]text[/code] without overlaps. BiDi algorithm will be used on each range separately.
Marks an input event as handled. Once you accept an input event, it stops propagating, even to nodes listening to [method Node._unhandled_input] or [method Node._unhandled_key_input].
Creates a local override for a theme [Color] with the specified [code]name[/code]. Local overrides always take precedence when fetching theme items for the control. An override can be removed with [method remove_theme_color_override].
Creates a local override for a theme constant with the specified [code]name[/code]. Local overrides always take precedence when fetching theme items for the control. An override can be removed with [method remove_theme_constant_override].
Creates a local override for a theme [Font] with the specified [code]name[/code]. Local overrides always take precedence when fetching theme items for the control. An override can be removed with [method remove_theme_font_override].
Creates a local override for a theme font size with the specified [code]name[/code]. Local overrides always take precedence when fetching theme items for the control. An override can be removed with [method remove_theme_font_size_override].
Creates a local override for a theme icon with the specified [code]name[/code]. Local overrides always take precedence when fetching theme items for the control. An override can be removed with [method remove_theme_icon_override].
Creates a local override for a theme [StyleBox] with the specified [code]name[/code]. Local overrides always take precedence when fetching theme items for the control. An override can be removed with [method remove_theme_stylebox_override].
Forces drag and bypasses [method _get_drag_data] and [method set_drag_preview] by passing [code]data[/code] and [code]preview[/code]. Drag will start even if the mouse is neither over nor pressed on this control.
The methods [method _can_drop_data] and [method _drop_data] must be implemented on controls that want to receive drop data.
Returns the anchor for the specified [enum Side]. A getter method for [member anchor_bottom], [member anchor_left], [member anchor_right] and [member anchor_top].
Returns the focus neighbor for the specified [enum Side]. A getter method for [member focus_neighbor_bottom], [member focus_neighbor_left], [member focus_neighbor_right] and [member focus_neighbor_top].
Returns the anchor for the specified [enum Side]. A getter method for [member offset_bottom], [member offset_left], [member offset_right] and [member offset_top].
Returns a [Color] from the first matching [Theme] in the tree if that [Theme] has a color item with the specified [code]name[/code] and [code]theme_type[/code]. If [code]theme_type[/code] is omitted the class name of the current control is used as the type, or [member theme_type_variation] if it is defined. If the type is a class name its parent classes are also checked, in order of inheritance. If the type is a variation its base types are checked, in order of dependency, then the control's class name and its parent classes are checked.
For the current control its local overrides are considered first (see [method add_theme_color_override]), then its assigned [member theme]. After the current control, each parent control and its assigned [member theme] are considered; controls without a [member theme] assigned are skipped. If no matching [Theme] is found in the tree, a custom project [Theme] (see [member ProjectSettings.gui/theme/custom]) and the default [Theme] are used.
Returns a constant from the first matching [Theme] in the tree if that [Theme] has a constant item with the specified [code]name[/code] and [code]theme_type[/code].
Returns a [Font] from the first matching [Theme] in the tree if that [Theme] has a font item with the specified [code]name[/code] and [code]theme_type[/code].
Returns a font size from the first matching [Theme] in the tree if that [Theme] has a font size item with the specified [code]name[/code] and [code]theme_type[/code].
Returns an icon from the first matching [Theme] in the tree if that [Theme] has an icon item with the specified [code]name[/code] and [code]theme_type[/code].
Returns a [StyleBox] from the first matching [Theme] in the tree if that [Theme] has a stylebox item with the specified [code]name[/code] and [code]theme_type[/code].
Returns [code]true[/code] if there is a matching [Theme] in the tree that has a color item with the specified [code]name[/code] and [code]theme_type[/code].
Returns [code]true[/code] if there is a matching [Theme] in the tree that has a constant item with the specified [code]name[/code] and [code]theme_type[/code].
Returns [code]true[/code] if there is a matching [Theme] in the tree that has a font item with the specified [code]name[/code] and [code]theme_type[/code].
Returns [code]true[/code] if there is a matching [Theme] in the tree that has a font size item with the specified [code]name[/code] and [code]theme_type[/code].
Returns [code]true[/code] if there is a matching [Theme] in the tree that has an icon item with the specified [code]name[/code] and [code]theme_type[/code].
Returns [code]true[/code] if there is a matching [Theme] in the tree that has a stylebox item with the specified [code]name[/code] and [code]theme_type[/code].
Invalidates the size cache in this node and in parent nodes up to top_level. Intended to be used with [method get_minimum_size] when the return value is changed. Setting [member rect_min_size] directly calls this method automatically.
Removes a local override for a theme [Color] with the specified [code]name[/code] previously added by [method add_theme_color_override] or via the Inspector dock.
Removes a local override for a theme constant with the specified [code]name[/code] previously added by [method add_theme_constant_override] or via the Inspector dock.
Removes a local override for a theme [Font] with the specified [code]name[/code] previously added by [method add_theme_font_override] or via the Inspector dock.
Removes a local override for a theme font size with the specified [code]name[/code] previously added by [method add_theme_font_size_override] or via the Inspector dock.
Removes a local override for a theme icon with the specified [code]name[/code] previously added by [method add_theme_icon_override] or via the Inspector dock.
Removes a local override for a theme [StyleBox] with the specified [code]name[/code] previously added by [method add_theme_stylebox_override] or via the Inspector dock.
Sets the anchor for the specified [enum Side] to [code]anchor[/code]. A setter method for [member anchor_bottom], [member anchor_left], [member anchor_right] and [member anchor_top].
If [code]keep_offset[/code] is [code]true[/code], offsets aren't updated after this operation.
If [code]push_opposite_anchor[/code] is [code]true[/code] and the opposite anchor overlaps this anchor, the opposite one will have its value overridden. For example, when setting left anchor to 1 and the right anchor has value of 0.5, the right anchor will also get value of 1. If [code]push_opposite_anchor[/code] was [code]false[/code], the left anchor would get value 0.5.
Works the same as [method set_anchor], but instead of [code]keep_offset[/code] argument and automatic update of offset, it allows to set the offset yourself (see [method set_offset]).
Sets the anchors to a [code]preset[/code] from [enum Control.LayoutPreset] enum. This is the code equivalent to using the Layout menu in the 2D editor.
Forwarding can be implemented in the target control similar to the methods [method _get_drag_data], [method _can_drop_data], and [method _drop_data] but with two differences:
Shows the given control at the mouse pointer. A good time to call this method is in [method _get_drag_data]. The control must not be in the scene tree. You should not free the control, and you should not keep a reference to the control beyond the duration of the drag. It will be deleted automatically after the drag has ended.
Sets the anchor for the specified [enum Side] to the [Control] at [code]neighbor[/code] node path. A setter method for [member focus_neighbor_bottom], [member focus_neighbor_left], [member focus_neighbor_right] and [member focus_neighbor_top].
Sets the offset for the specified [enum Side] to [code]offset[/code]. A setter method for [member offset_bottom], [member offset_left], [member offset_right] and [member offset_top].
Sets the offsets to a [code]preset[/code] from [enum Control.LayoutPreset] enum. This is the code equivalent to using the Layout menu in the 2D editor.
Use parameter [code]resize_mode[/code] with constants from [enum Control.LayoutPresetMode] to better determine the resulting size of the [Control]. Constant size will be ignored if used with presets that change size, e.g. [code]PRESET_LEFT_WIDE[/code].
Use parameter [code]margin[/code] to determine the gap between the [Control] and the edges.
Anchors the bottom edge of the node to the origin, the center, or the end of its parent control. It changes how the bottom offset updates when the node moves or changes size. You can use one of the [enum Anchor] constants for convenience.
Anchors the left edge of the node to the origin, the center or the end of its parent control. It changes how the left offset updates when the node moves or changes size. You can use one of the [enum Anchor] constants for convenience.
Anchors the right edge of the node to the origin, the center or the end of its parent control. It changes how the right offset updates when the node moves or changes size. You can use one of the [enum Anchor] constants for convenience.
Anchors the top edge of the node to the origin, the center or the end of its parent control. It changes how the top offset updates when the node moves or changes size. You can use one of the [enum Anchor] constants for convenience.
Tells Godot which node it should give keyboard focus to if the user presses the down arrow on the keyboard or down on a gamepad by default. You can change the key by editing the [code]ui_down[/code] input action. The node must be a [Control]. If this property is not set, Godot will give focus to the closest [Control] to the bottom of this one.
Tells Godot which node it should give keyboard focus to if the user presses the left arrow on the keyboard or left on a gamepad by default. You can change the key by editing the [code]ui_left[/code] input action. The node must be a [Control]. If this property is not set, Godot will give focus to the closest [Control] to the left of this one.
Tells Godot which node it should give keyboard focus to if the user presses the right arrow on the keyboard or right on a gamepad by default. You can change the key by editing the [code]ui_right[/code] input action. The node must be a [Control]. If this property is not set, Godot will give focus to the closest [Control] to the bottom of this one.
Tells Godot which node it should give keyboard focus to if the user presses the top arrow on the keyboard or top on a gamepad by default. You can change the key by editing the [code]ui_top[/code] input action. The node must be a [Control]. If this property is not set, Godot will give focus to the closest [Control] to the bottom of this one.
Tells Godot which node it should give keyboard focus to if the user presses [kbd]Tab[/kbd] on a keyboard by default. You can change the key by editing the [code]ui_focus_next[/code] input action.
Tells Godot which node it should give keyboard focus to if the user presses [kbd]Shift + Tab[/kbd] on a keyboard by default. You can change the key by editing the [code]ui_focus_prev[/code] input action.
Controls the direction on the horizontal axis in which the control should grow if its horizontal minimum size is changed to be greater than its current size, as the control always has to be at least the minimum size.
Controls the direction on the vertical axis in which the control should grow if its vertical minimum size is changed to be greater than its current size, as the control always has to be at least the minimum size.
Changes the tooltip text. The tooltip appears when the user's mouse cursor stays idle over this control for a few moments, provided that the [member mouse_filter] property is not [constant MOUSE_FILTER_IGNORE]. You can change the time required for the tooltip to appear with [code]gui/timers/tooltip_delay_sec[/code] option in Project Settings.
The tooltip popup will use either a default implementation, or a custom one that you can provide by overriding [method _make_custom_tooltip]. The default tooltip includes a [PopupPanel] and [Label] whose theme properties can be customized using [Theme] methods with the [code]"TooltipPanel"[/code] and [code]"TooltipLabel"[/code] respectively. For example:
[codeblocks]
[gdscript]
var style_box = StyleBoxFlat.new()
style_box.set_bg_color(Color(1, 1, 0))
style_box.set_border_width_all(2)
# We assume here that the `theme` property has been assigned a custom Theme beforehand.
Controls whether the control will be able to receive mouse button input events through [method _gui_input] and how these events should be handled. Also controls whether the control can receive the [signal mouse_entered], and [signal mouse_exited] signals. See the constants to learn what each does.
Offsets are often controlled by one or multiple parent [Container] nodes, so you should not modify them manually if your node is a direct child of a [Container]. Offsets update automatically when you move or resize the node.
Offsets are often controlled by one or multiple parent [Container] nodes, so you should not modify them manually if your node is a direct child of a [Container]. Offsets update automatically when you move or resize the node.
Offsets are often controlled by one or multiple parent [Container] nodes, so you should not modify them manually if your node is a direct child of a [Container]. Offsets update automatically when you move or resize the node.
Offsets are often controlled by one or multiple parent [Container] nodes, so you should not modify them manually if your node is a direct child of a [Container]. Offsets update automatically when you move or resize the node.
Enables whether rendering of [CanvasItem] based children should be clipped to this control's rectangle. If [code]true[/code], parts of a child which would be visibly outside of this control's rectangle will not be rendered and won't receive input.
The minimum size of the node's bounding rectangle. If you set it to a value greater than (0, 0), the node's bounding rectangle will always have at least this size, even if its content is smaller. If it's set to (0, 0), the node sizes automatically to fit its content, be it a texture or child nodes.
By default, the node's pivot is its top-left corner. When you change its [member rect_scale], it will scale around this pivot. Set this property to [member rect_size] / 2 to center the pivot in the node's rectangle.
The node's position, relative to its parent. It corresponds to the rectangle's top-left corner. The property is not affected by [member rect_pivot_offset].
The node's scale, relative to its [member rect_size]. Change this property to scale the node around its [member rect_pivot_offset]. The Control's [member hint_tooltip] will also scale according to this value.
[b]Note:[/b] This property is mainly intended to be used for animation purposes. Text inside the Control will look pixelated or blurry when the Control is scaled. To support multiple resolutions in your project, use an appropriate viewport stretch mode as described in the [url=https://docs.godotengine.org/en/latest/tutorials/viewports/multiple_resolutions.html]documentation[/url] instead of scaling Controls individually.
[b]Note:[/b] If the Control node is a child of a [Container] node, the scale will be reset to [code]Vector2(1, 1)[/code] when the scene is instantiated. To set the Control's scale when it's instantiated, wait for one frame using [code]yield(get_tree(), "idle_frame")[/code] then set its [member rect_scale] property.
Tells the parent [Container] nodes how they should resize and place the node on the X axis. Use one of the [enum SizeFlags] constants to change the flags. See the constants to learn what each does.
If the node and at least one of its neighbors uses the [constant SIZE_EXPAND] size flag, the parent [Container] will let it take more or less space depending on this property. If this node has a stretch ratio of 2 and its neighbor a ratio of 1, this node will take two thirds of the available space.
Tells the parent [Container] nodes how they should resize and place the node on the Y axis. Use one of the [enum SizeFlags] constants to change the flags. See the constants to learn what each does.
The [Theme] resource this node and all its [Control] children use. If a child node has its own [Theme] resource set, theme items are merged with child's definitions having higher priority.
The name of a theme type variation used by this [Control] to look up its own theme items. When empty, the class name of the node is used (e.g. [code]Button[/code] for the [Button] control), as well as the class names of all parent classes (in order of inheritance).
When set, this property gives the highest priority to the type of the specified name. This type can in turn extend another type, forming a dependency chain. See [method Theme.set_type_variation]. If the theme item cannot be found using this type or its base types, lookup falls back on the class names.
[b]Note:[/b] To look up [Control]'s own items use various [code]get_theme_*[/code] methods without specifying [code]theme_type[/code].
[b]Note:[/b] Theme items are looked for in the tree order, from branch to root, where each [Control] node is checked for its [member theme] property. The earliest match against any type/class name is returned. The project-level Theme and the default Theme are checked last.
[b]Note:[/b] [signal mouse_entered] will not be emitted if the mouse enters a child [Control] node before entering the parent's [code]Rect[/code] area, at least until the mouse is moved to reach the parent's [code]Rect[/code] area.
[b]Note:[/b] [signal mouse_exited] will be emitted if the mouse enters a child [Control] node, even if the mouse cursor is still inside the parent's [code]Rect[/code] area.
Sent when the node's [member theme] changes, right before Godot redraws the control. Happens when you call one of the [code]add_theme_*_override[/code] methods.
Show the system's I-beam mouse cursor when the user hovers the node. The I-beam pointer has a shape similar to "I". It tells the user they can highlight or insert text.
Show the system's drag mouse cursor, often a closed fist or a cross symbol, when the user hovers the node. It tells the user they're currently dragging an item, like a node in the Scene dock.
Show the system's drop mouse cursor when the user hovers the node. It can be an open hand. It tells the user they can drop an item they're currently grabbing, like a node in the Scene dock.
Show the system's vertical resize mouse cursor when the user hovers the node. A double-headed vertical arrow. It tells the user they can resize the window or the panel vertically.
Show the system's horizontal resize mouse cursor when the user hovers the node. A double-headed horizontal arrow. It tells the user they can resize the window or the panel horizontally.
Show the system's window resize mouse cursor when the user hovers the node. The cursor is a double-headed arrow that goes from the bottom left to the top right. It tells the user they can resize the window or the panel both horizontally and vertically.
Show the system's window resize mouse cursor when the user hovers the node. The cursor is a double-headed arrow that goes from the top left to the bottom right, the opposite of [constant CURSOR_BDIAGSIZE]. It tells the user they can resize the window or the panel both horizontally and vertically.
Show the system's move mouse cursor when the user hovers the node. It shows 2 double-headed arrows at a 90 degree angle. It tells the user they can move a UI element freely.
Snap all 4 anchors to the left edge of the parent control. The left offset becomes relative to the left edge and the top offset relative to the top left corner of the node's parent. Use with [method set_anchors_preset].
Snap all 4 anchors to the top edge of the parent control. The left offset becomes relative to the top left corner, the top offset relative to the top edge, and the right offset relative to the top right corner of the node's parent. Use with [method set_anchors_preset].
Snap all 4 anchors to the right edge of the parent control. The right offset becomes relative to the right edge and the top offset relative to the top right corner of the node's parent. Use with [method set_anchors_preset].
Snap all 4 anchors to the bottom edge of the parent control. The left offset becomes relative to the bottom left corner, the bottom offset relative to the bottom edge, and the right offset relative to the bottom right corner of the node's parent. Use with [method set_anchors_preset].
Snap all 4 anchors to the respective corners of the parent control. Set all 4 offsets to 0 after you applied this preset and the [Control] will fit its parent control. This is equivalent to the "Full Rect" layout option in the editor. Use with [method set_anchors_preset].
Tells the parent [Container] to expand the bounds of this node to fill all the available space without pushing any other node. Use with [member size_flags_horizontal] and [member size_flags_vertical].
Tells the parent [Container] to let this node take all the available space on the axis you flag. If multiple neighboring nodes are set to expand, they'll share the space based on their stretch ratio. See [member size_flags_stretch_ratio]. Use with [member size_flags_horizontal] and [member size_flags_vertical].
Tells the parent [Container] to center the node in itself. It centers the control based on its bounding box, so it doesn't work with the fill or expand size flags. Use with [member size_flags_horizontal] and [member size_flags_vertical].
Tells the parent [Container] to align the node with its end, either the bottom or the right edge. It doesn't work with the fill or expand size flags. Use with [member size_flags_horizontal] and [member size_flags_vertical].
The control will receive mouse button input events through [method _gui_input] if clicked on. And the control will receive the [signal mouse_entered] and [signal mouse_exited] signals. These events are automatically marked as handled, and they will not propagate further to other controls. This also results in blocking signals in other controls.
The control will receive mouse button input events through [method _gui_input] if clicked on. And the control will receive the [signal mouse_entered] and [signal mouse_exited] signals. If this control does not handle the event, the parent control (if any) will be considered, and so on until there is no more parent control to potentially handle it. This also allows signals to fire in other controls. Even if no control handled it at all, the event will still be handled automatically, so unhandled input will not be fired.
The control will not receive mouse button input events through [method _gui_input]. The control will also not receive the [signal mouse_entered] nor [signal mouse_exited] signals. This will not block other controls from receiving these events or firing the signals. Ignored events will not be handled automatically.
Snaps one of the 4 anchor's sides to the origin of the node's [code]Rect[/code], in the top left. Use it with one of the [code]anchor_*[/code] member variables, like [member anchor_left]. To change all 4 anchors at once, use [method set_anchors_preset].
Snaps one of the 4 anchor's sides to the end of the node's [code]Rect[/code], in the bottom right. Use it with one of the [code]anchor_*[/code] member variables, like [member anchor_left]. To change all 4 anchors at once, use [method set_anchors_preset].
