For some reason I can not undo (crtl+z) when I do something in some of my projects. If I add some text or move a box or whatever I'm not able to undo anything to the previous state. This does not make any sense to me. The project worked fine the day before, but when I logged on the next day I simply could not undo anything when I started working on my project again. Also of interested; When I add a new textbox non of the letters will show before I go out of the textbox and press something else in the project window. Same thing goes for when I'm editing shapes. The edit won't take place before I click on something else. I have tried the same project-file on another computer with CS6 and it does not work there either. I work with files on a network drive.
Does anybody have any idea why and what I could do?
Look into the settings in the Preferences (Edit -> Preferences -> General) and see if the number of undo levels has been changed to 0.
Good tip, but it was set to 100. Tried to change it to 99, but it still doesn't work.
Ned was close. Go to Edit->Preferences->General Change Undo: from "Document-level Undo" to "Object-level Undo" it might warn you that switching will delete your undo history click ok.