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Both 2D and 3D rotation want an angle. Many times I don't know the angle.
The Manipulator allows me to visually play with the angle by looking at the far end of the item being rotated with respect to another object. I can get close, but no cigar. If I zoom in close enough to get the granularity, I can't see what I'm doing.
Is there any way with any command to specify a rotation axis or point and then go to the other end of the object and tell the command to put this point on the rotated object onto another point on a stationary object and the angle is what ever it is?