Saudio, try this.
Take off and fly the P3 to the altitude and course you want. Hover.
Flip to F. A warning screen will come up.
Select Course Lock and push apply to accept your course.
In a hover, adjust the camera angle with left stick and gimble control.
Now use your right stick only (forward or aft) to move along your selected "locked" course.
You can even move along your course (with right stick forward or aft) and spin the P3 in yaw (left stick right or left) as you go.
Warning: practice in a wide open area until you are confident in what the sticks are doing in course lock...
Thanks, I'm waiting for the wind to die down to give this a try. 20mph gusting to 40mph right now.