What would we do without UNDO?
- [Ctrl] + [z] = UNDO the mistake you just made. In a program that has several levels of UNDO, repeat the shortcut to back-track.
Working with objects
Objects are files, pictures, or anything that is on your screen. When you click your mouse once in an open window you tell the computer to focus on that window and the object you clicked on. If you just want to select the window