Is there a way to control to which rack a module is added?

I created 4 or 5 different racks and want to copy some modules of each into a new "buy this" rack. Therefore I opened each module in a separate tab, but "add to rack" does not add to the desired target. I closed all other tabs that have racks and only opened the "buy this" rack.

Any other workflow that would help?

Check out the sticky topic "Using the planner". Maybe the keyboard shortcuts will help you accomplish what you want.

Thank you, will take a look and try.