I inserted this 'button' on a subtool and was able to transpose just the button. At the time I was happy with it and continued but now I'm having trouble selecting JUST the button for transposing. I can split the polygroups and select just the button with Ctrl+Shift which lets me transpose the button BUT it hides the rest…
Once you have the button isolated thanks to ctrl-shift clicking, mask it with the masking method of your choice (rectangle marquee in this case) and then unhide everything else. The mask should still be active after you make everything visible and you can go on from there. It's a bit more than a single click action, but…