@mentions & scope.
Type @ anywhere in a command and pick from the autocomplete.
Whatever you mention becomes the command's scope — Copilot gets the exact
element ids, so there's no guessing by name.
What you can mention
@Level 1,@Aras 01— any level by name@Doors,@Walls,@Rooms— any whole category@selected— whatever you've already picked in Revit
In practice
delete all @Doors on @Level 1 set FireRating to 60 on @Doors in corridor rooms isolate @selected count @Walls by level
Why it matters
A mention hands Copilot the resolved elements — ids and counts — before it does anything. The reply names the count up front (47 doors on Level 1), so you know the scope is right before the change happens. Works the same in English and Bahasa Malaysia.