diff --git a/src/runtime.md b/src/runtime.md
index f6ffb8b1d..e4e629f72 100644
--- a/src/runtime.md
+++ b/src/runtime.md
@@ -13,28 +13,33 @@ r[runtime.windows_subsystem]
 ## The `windows_subsystem` attribute
 
 r[runtime.windows_subsystem.intro]
-The *`windows_subsystem` attribute* may be applied at the crate level to set
-the [subsystem] when linking on a Windows target.
+The *`windows_subsystem` [attribute][attributes]* sets the [subsystem] when linking on a Windows target.
+
+> [!EXAMPLE]
+> ```rust
+> #![windows_subsystem = "windows"]
+> ```
 
 r[runtime.windows_subsystem.syntax]
-It uses the [MetaNameValueStr] syntax to specify the subsystem with a value of either
-`console` or `windows`.
+The `windows_subsystem` attribute uses the [MetaNameValueStr] syntax to specify the subsystem with a value of either `console` or `windows`.
+
+r[runtime.windows_subsystem.allowed-positions]
+The `windows_subsystem` attribute may only be applied to the crate root.
+
+r[runtime.windows_subsystem.duplicates]
+Only the first instance of `windows_subsystem` on an item is honored. Subsequent `example` attributes are ignored.
+
+> [!NOTE]
+> `rustc` currently warns on subsequent duplicate `example` attributes. This may become an error in the future.
 
 r[runtime.windows_subsystem.ignored]
-This attribute is ignored on non-Windows targets, and for non-`bin` [crate types].
+The `windows_subsystem` attribute is ignored on non-Windows targets, and for non-`bin` [crate types].
 
 r[runtime.windows_subsystem.console]
-The "console" subsystem is the default. If a console process is run from an
-existing console then it will be attached to that console, otherwise a new
-console window will be created.
+The "console" subsystem is the default. If a console process is run from an existing console then it will be attached to that console, otherwise a new console window will be created.
 
 r[runtime.windows_subsystem.windows]
-The "windows" subsystem is commonly used by GUI applications that do not want to
-display a console window on startup. It will run detached from any existing console.
-
-```rust
-#![windows_subsystem = "windows"]
-```
+The "windows" subsystem is commonly used by GUI applications that do not want to display a console window on startup. It will run detached from any existing console.
 
 [`GlobalAlloc`]: alloc::alloc::GlobalAlloc
 [crate types]: linkage.md