diff --git a/core/lib/src/config/mod.rs b/core/lib/src/config/mod.rs
index f99c444b..e134b05a 100644
--- a/core/lib/src/config/mod.rs
+++ b/core/lib/src/config/mod.rs
@@ -58,8 +58,9 @@
 //!
 //! An application that wants to use Rocket's defaults for [`Config`], but not
 //! its configuration sources, while allowing the application to be configured
-//! via an `App.toml` file and `APP_` environment variables, can be structured
-//! as follows:
+//! via an `App.toml` file that uses top-level keys as profiles (`.nested()`)
+//! and `APP_` environment variables as global overrides (`.global()`), can be
+//! structured as follows:
 //!
 //! ```rust
 //! # #[macro_use] extern crate rocket;
@@ -83,8 +84,8 @@
 //! fn rocket() -> _ {
 //!     let figment = Figment::from(rocket::Config::default())
 //!         .merge(Serialized::defaults(Config::default()))
-//!         .merge(Toml::file("App.toml"))
-//!         .merge(Env::prefixed("APP_"));
+//!         .merge(Toml::file("App.toml").nested())
+//!         .merge(Env::prefixed("APP_").global());
 //!
 //!     rocket::custom(figment)
 //!         .mount("/", routes![/* .. */])
diff --git a/site/guide/9-configuration.md b/site/guide/9-configuration.md
index 937a1d6a..22ad22f4 100644
--- a/site/guide/9-configuration.md
+++ b/site/guide/9-configuration.md
@@ -302,7 +302,9 @@ fn rocket() -> _ {
 
 More involved, consider an application that wants to use Rocket's defaults for
 [`Config`], but not its configuration sources, while allowing the application to
-be configured via an `App.toml` file and `APP_` environment variables:
+be configured via an `App.toml` file that uses top-level keys as profiles
+(`.nested()`) and `APP_` environment variables as global overrides
+(`.global()`):
 
 ```rust
 # #[macro_use] extern crate rocket;
@@ -327,8 +329,8 @@ impl Default for Config {
 fn rocket() -> _ {
     let figment = Figment::from(rocket::Config::default())
         .merge(Serialized::defaults(Config::default()))
-        .merge(Toml::file("App.toml"))
-        .merge(Env::prefixed("APP_"));
+        .merge(Toml::file("App.toml").nested())
+        .merge(Env::prefixed("APP_").global());
 
     rocket::custom(figment)
         .mount("/", routes![/* .. */])