About scalling throttle

hello people on the previous board kk2.1 i was able to scaling the throttle and the result was the one that i want that was to be able to maintain a good hovering flight i am in acro mode in the radio that is an hitec eclipse 7 and i would like to have i better scalling in the throttle if someon e please tell me how can i achieve that throw the mission planner ? thanks best regards