Martiens

Hi. I was wondering if there is a way to state the order of parts to be printed in ALL AT ONCE mode? I want to do filament changes with my Ender 3 at certain height for multiple color prints so I want to add a "purging block" in my print and ensure that after filament change the print will resume by first purging on the purging block. I know I can play around with it and see where the print start and work from there, but surely there must be a way to tell Cura where to start printing? Thanks in advance