Is there a way to precisely scale an image after it has been inserted? I know how to get the image into MoI, I know how to use the Custom Distance command to measure a known component (or use a line as a ruler of sorts and note the size on the command palette) and I know how to calculate to scale up to full size. But, I can't seem to find a way to scale the image precisely with the scale tools.

What I tried, that seems to work, is insert the image, place a line over a known distance, rescale that line to the desired size of the image and then reinsert the image using that line to snap to as an insert guide. Is this the normal method used by MoI uses?