Edit
This option allows you to perform any of the following functions::
- Undo - Ctrl+Z
- Redo - Ctrl+Y
- Copy - Ctrl+C
- Cut - Ctrl+X
- Paste - Ctrl+V
- Edit Title Block, which when selected will open a window where you can edit the diagram's title block.

Note that for this option to work, a diagram must be open in the Diagram Panel.