Commander, Starfleet
Commander, Starfleet, also known as Starfleet Commander, was a high-level Starfleet position given to a fleet admiral. It was similar to the Starfleet chief of staff and the commander in chief.

Fleet Admiral Morrow held the position in 2285. ()

In 2372, the Commander, Starfleet ordered all Starfleet cadets, including Cadet Training Squadron 47, to perform field duty on Earth. ()

Appendices

Related topics
Fleet Commander
Supreme Commander
Theater Commander

Background information 
Commander, Starfleet's orders appeared on a viewscreen viewed by Odo and Sisko in . This order also implied that his office was located in Paris, as the order was transmitted from there via a satellite and Luna to San Francisco.

Others who may have had this position include:
Admiral Robert L. Comsol, the commanding officer of Starfleet Command ()
Fleet Admiral Cartwright, who was written into the Star Trek IV script in place of Morrow ()
Fleet Admiral Bob, the chief of staff, listed as a "commander" in the script ()
Fleet Admiral , the commander in chief, who assigned Captain James T. Kirk to escort Klingon Chancellor Gorkon to Earth for treaty negotiations ()
Admiral Rick Berman, listed as a "commander" on the crew manifest of the  ()
Vice Admiral Jeri Taylor, listed as a "commander" on the crew manifest of the USS Voyager ()
Titles