wording

docs/guide/command_palette.md

@@ -36,7 +36,8 @@ Textual apps have a number of *system* commands enabled by default.
 These are declared in the [`App.get_system_commands`][textual.app.App.get_system_commands] method.
 You can implement this method in your App class to add more commands.
 
-To declare a command, define a `get_system_commands` method, which will receive the screen that was active when the user summoned the command palette. 
+To declare a command, define a `get_system_commands` method on your App.
+Textual will call this with the screen that was active when the user summoned the command palette. 
 You can add a command by yielding a tuple of `(TITLE, HELP TEXT, CALLABLE)`.
 The `TITLE` and `HELP TEXT` values are shown in the command palette.
 If the user selects that command, then Textual will invoke `CALLABLE`.