Adjust the value and bearing of the forces using the sliders at the top. Adjust the zoom with the slider at the bottom Press A or a surprise (use S to stop it)
The correct bearing of resultant will keep the bearing of the resultant to between 0 and 360. With it on it may cause some issues. If you only want the display keep it off and if you want the reading keep it on or turn it off and add or subtract 360 if you want the bearing of the resultant between 0 and 360.