creative Solutions and Musings by Carl Gibson
Here is a quick tip to help you stay in that command while being able to switch targets. See below the break for more specifics on what this tip covers.
While in a multi-part command like Join with the Multiple Join option checked, you can switch targets of the join by dragging a selection area (ie: using the fence option new in 2015). If you drag an area without selecting anything you can clear the join target and move on using the same command without leaving the command.