Help limiting Media Encoder Queue to run in sequence - not all at once

I am fairly new to Adobe Media Encoder.  I am looking to save several items to the encodeing queue, but I want to limit the program to run them in sequene to avoid having any hardware issues.  I am using GPU rendering to help speed, but each time I click on run, it starts running multiple items at once.

Please help.  This community has been great helping me already - thanks!