Just getting into the app, and I am wondering if you can consider this feature request. It's very frustrating in design software when you have reference images, but you can't easily set them to the correct scale. It's quite fiddly and a pain in the butt. Fusion360 does this really well when you add a canvas. You have the option to "Calibrate the image". It entails right-clicking on the reference image, choosing Calibrate from the pop-up menu. And then you draw a line from 2 known points on the image and type in the dimension. That is then interpolated, and the image is scaled to where those 2 points are the length you typed in. It's convenient, and I find it super frustrating that other software does not have this feature.