Right now macros only can be used as a session handling action to set a parameter or a cookie, but it would be very useful to use them after performing a request to test the contents of another response (for example, to test a second order SQL Injection).
It would be also very useful to have the possibility of execute a previously recorded macro from an extension.
Thanks for considering the request!
You can use the “post-request macro” session handling action to do this. You can optionally select whether to just run the macro (e.g. to clean up something) or whether to pass the response from the macro back to the invoking tool (e.g. to test the effect of a request on a different page of the application).