To insert a line break into the text of an object description, use the keys Ctrl-M.
With the "Undo" functionality you can cancel your last edit command.
With the "Redo" functionality you can cancel your last "Undo" command.
The "Undo" command reverses the last edit command done in the active document.
You can only undo operations on objects like paste, copy, delete, connect, resize etc. You cannot undo any modifications of object attributes, zoom actions, setting of options, simulations and so on.
The use of "Undo" returns the document to its state prior to the most recent operation.
There are several possibilities to undo your last edit command:
The "Redo" command re-applies the actions or commands on which you have used the "Undo" command.
There are several possibilities to redo your last "Undo" command: