Syntax: SaveAll
Abbreviation: SL
saves all modified documents. If any modified documents cannot be
saved, the action is suspended and an error message is issued. Note that
only named documents can be saved, so SaveAll will report an error
if you have any modified unnamed documents. Other reasons SaveAll
may fail include: if any of the modified documents’ corresponding files
have been updated since they were loaded or last saved, or if any modified
documents’ read only flags are set.