Expand Camera Dropdown Menu
In the waypoint mission item on the right hand side of the screen select the camera drop down menu.
Check the Gimbal Box and Set Gimbal Angle
Check the gimbal options box, then enter your desired gimbal pitch angle
Finish Planning Mission
Plan the rest of your mission as normal. The gimbal will change the pitch angle of the sensor at the waypoint and remain at that pitch angle throughout the rest of the mission.
To add additional gimbal pitch changes use the same method between survey mission items, or plan a waypoint mission and add the gimbal change commands as desired.
Upload the mission to the aircraft.