How do I restrict a macro to operate in just one application?
Check out this wiki page. The first few sentences should explain it.
http://wiki.keyboardmaestro.com/Macro_Groups
Is this what you are looking for?
Also read the Quick Start, which in part has this quick overview:
- If you want to make changes, use the Editor.
- If you want anything to work, make sure the Engine is running.
- If you want to control when a Macro is active, configure the Macro Group.
- If you want to control when a Macro is executed, configure its Triggers.
- If you want to control what a Macro does, configure its Actions.