The Edit Menu

EditUndo (Ctrl+Z)

Go back in the result stack.

EditRedo (Ctrl+Shift+Z)

Go forward in the result stack.

EditCut (Ctrl+X)

Delete the displayed result and copy it to the clipboard.

EditCopy (Ctrl+C)

Copy the displayed result to the clipboard.

EditPaste (Ctrl+V)

Insert the cut or copied result in the display.