Going from engrave to cut and using air assist

Hi All
Newbie question
How to engrave something then cut around it in lightburn using air assist. As I understand it AA is best used for cutting only. If you’ve only got something like aquarium air pump is there a way to pause lightburn from starting the cut till your ready. This is for a diode laser.
I know on Sculpfun S30 it’s done automatically thru software.
Hopefully this makes sense.
Cheers Geoff