Jumper T8SG V2 Plus throttle limit control

Would anyone know how or if it is possible to use one of the sliders on the sides of the radio to Increase/decrease the throttle limit? Instead of setting the throttle limit percentage in Betaflight. I saw a video on youtube on how to do it on a Taranis radio that uses opentx, but can't find a how to on this radio firmwware.