Set rotation step
This function is used to view or alter the rotation increment angle which is used by the Orbit and Roll functions.
To run this function: Choose View > Rotate image > Set rotation step, or...
Increment value
Enter the angle which is to be used as the value for incremental rotations of the view. The value is an angle expressed in decimal degrees. The current value is displayed as the default input.
The specified value is saved for future use in the current session.