Angle measurement
Measure the angle between two lines by placing three points, both in 2D or 3D.
Click Angle 
on the Diagnose tab.
Indicate the first point on the model or a reslice.
Indicate the second point.
Indicate the third point. The angle is shown on the 3D model as well as listed in the Diagnose smart panel in the Measurements group.
Angle measurements are dynamic. A point placed on a bone fragment will remain attached to its position on the bone. When bone fragments are moved during a surgery planning, affecting the position of a specific point in a measurement, the angle measurements will be updated accordingly.
Hide an angle measurement
Hide an angle measurement either using the visibility editor or via the right-click menu.
Right-click the angle measurement.
Choose Hide from the right-click menu.
The measurement is hidden. To display it again, use the visibility editor icons in the Diagnose smart panel.
Delete an angle measurement
To delete the angle measurement:
Right-click the angle measurement.
Choose Delete from the pop-up menu.