Hello guys! I've got another problem...When I create a new mesh (like cylinder on the screenshot) I want to change a number of subdivisions in the Add Cylinder window, but I can't do it and don't know why..?
I noticed that it's working with the global undo turned on. Don't really know why is it happened.
That is a bit of a confusing name, but Global Undo is the undo per se. It may sound like if you turn that off, you switch to a Local Undo, but you completely turn off the undo ability. Only useful to save memory. Just don't make any mistakes.
Strangely enough: SHIFT+R repeat last operation still works.