if you have your change page behavior set on leave in background, then just create a macro where you choose all the masters one at the time and release them. Edit your macro time a little bit and you should have your macro ready to release only the current page!
if you have your change page behavior set on leave in background, then just create a macro where you choose all the masters one at the time and release them. Edit your macro time a little bit and you should have your macro ready to release only the current page!