Hi propmaster, while you are in the View > Image command you can use the Align option to do that. That allows you position and scale a background image from one reference line in the image to a target reference line in the model.

For your case before doing the Align set up 2 lines of the same length with one rotated by your desired angle and then snap on to the ends of those lines while doing the image align.

- Michael

Excellent! Thank You!

BTW, the Aug. 28 beta is amazing. Moi3D has been my favorite 3D software for years by a wide margin and it just keeps getting better. Thank you for everything you do.

Thanks propmaster, I'm glad you're liking MoI!

- Michael