To use shortcuts in the editor, left click in the editor window to make sure it is currently active in your browser and then you can use the following shortcuts:

Save: CTRL + Enter or ALT+S
Save as: CTRL + SHIFT + S
Publish: ALT + P
Republish: CTRL + SHIFT + R
Unpublish: CTRL + SHIFT + U
Undo: CTRL + SHIFT + Z
Redo: CTRL + SHIFT + Y