Throttle percentage in HUD?

I’m trying to get my rover tuned up and one of the steps is to set cruise_throttle to your throttle percentage when the rover is going at a speed equal to your cruise_speed. I don’t see a throttle percentage in the HUD and the online reference to the HUD doesn’t show it either.
http://ardupilot.org/planner/docs/mission-planner-ground-control-station.html#mission-planner-ground-control-station

How do I determine throttle percentage?

Using Mission Planner 1.3.38

Right click on the HUD, select ‘User Items’, then check ch3percentage

Yup, that did it!

thanks!