The first step in editing text is to select it (see Selecting text).
You can then:
Copy, move or delete (see Moving, copying and deleting text)
Apply text formatting (see Formatting text)
If you change your mind after editing or formatting the text, you can click the Undo button or select the Undo command from the Edit menu.
This command enables you to undo as many actions as you like, e.g. you can reverse your last few editing or formatting actions and further.
If you change your mind again, you can reverse the undo by clicking the Redo button or selecting the Redo command from the Edit menu.
If you want to perform several undos or redos at the same time, click on the arrow buttons next to the Undo and Redo buttons. In the "Undo" and "Redo" dialogs click on the action up to which you want to undo or redo: all the actions listed in the dialog that are placed before the action you click on will also be undone or redone.
See also: