Modifiers
 

Hi there peeps, does anyone know if there's a way to add modifiers (shift, Alt, etc) to the Click Buttons, i.e. clicking on button 1 casts one spell, shift-clicking on button 1 casts another?

I toyed with the idea, but the UI itself doesn't directly support key detection.

If there is a merchant window that always detected which button was visible (for when you try to buy a stack or single item) it might be possible though. Would be a tricky workaround ;)
From my experience though, once you're not in a transaction, that window doesn't update. I can investigate further.