New Astro Print Set Up Questions

I’m working on trying to switch from OctoPrint to AstroTouch I’m trying to figure out how to make the printer retract between movements and I’m trying to figure out how to get a Purge Line in the start G-Code but cant find the start G-Code Edit location…

Also trying to figure out why my camera wont set to 1080 it says my camera doesn’t support it, its a Depstech 1080P camera.

Thanks for any help.

I’m also wanting to move the DONE/Cancel position to the front not the rear. Sorry if these questions are basic I cant find anything anywhere about them.