If you need to manually adjust/override your speed while on an auto mission without editing all the mission waypoints, this can be done easily with the Tengri Ground Control unit.
Tengri Ground Control users can quickly adjust the waypoint speed while on mission using a dial or slider type of control on their Ground Control unit (either an RC transmitter or Ground Control Station). Map the button number of the dial or slider control to the Tengri Horizontal Target Speed command. The target speed can be adjusted from 0.2 meters per second to 20 meters per second. The selected target speed is also displayed on the top menu bar in QGC. See the video below.