This draft setup screen offers the commissioner the ability to alter an already-drafted player.  This screen is typically better suited for (1) franchises that have had their pick skipped AND the league allows them to make up the pick at any subsequent time, and (2) franchises that need a past pick changed that is more than one pick previous. 

For leagues that need to change the last pick, it might be easier for the commissioner to use the Revert Draft screen to revert the league's draft by a single pick.  A changed draft pick will include the text "Replacement pick made by Commissioner" in the comments column of the draft report.

When finished, you MUST click on the Change Draft Pick button to apply your change.