Is there a way to figure out which UDIM a certain subtool belongs to in ZBrush? When you export a map using MME, it knows it, so the information is there somewhere. Is there a straight-forward way of finding this? It’s sometimes really handy to have the UDIM number when working, I find.
This macro will do what you want.
Save the text file to your ZBrush /ZStartup/Macros/Misc folder and press Macro>Reload All Macros. You should then have a new button called GetUVTile in the Macro>Macros>Misc sub-palette. Press the button to find which UDIM/UV tile you are working on.