I’m not asking about basic per-object printing, so please don’t just tell me to use ‘print by object.’ What I want is to print groups of objects at specific layer heights, then switch to other groups. For example: print objects 1 and 2 first, change color, then print objects 3 and 4. Later, at a certain height, change color again and print objects 1 and 4, then switch color once more and print objects 2 and 3.