When there is one assigned 2D point (that is, one ray pin), you can move the import along the light ray (distance from camera = D button) and rotate it about the three axes. When there is one assigned 3D point (or point that is referenced but might not be 3D), the D (distance) button is removed and only the rotations are available.
The structure of the dialog is like the ‘No Assigned Points’ case (see above), other than the X,Y,Z translate buttons are replaced by one Distance (D) button, the Global/Local choice is removed, and the ‘Center on point’ button is removed. Click and drag on the D button to move the import along the light ray as defined by the 2D photo point. Or use the nudge buttons to change the distance a small amount. [Currently, two assigned points act like one assigned point].