You can do it for most labels by prepending text with "\1" (works in Layout designer too), in that case text is interpreted as QTF.
I can't seem to figure out how to do this in the layout designer. Where exactly do I put the \1?
If I have
SetLabel(t_("IST/ISR Input Screen"))
where do I tell it to use QTF?
I'm sorry, I just don't understand QTF/RTF at all. I thought it would be simpler to turn on word wrap in a button instead of having to increase the size of the button or reduce the text size to make it fit.