tooltip for scale factor is incorrect
Tooltip text incorrectly has < 0 and > 0 where it should have < 1 and > 1. Current text is:
image scale factor from native printer DPI: < 0 means that it is downscaled (best quality) > 0 means that the image is upscaled a too large value may result in poor print quality
See screenshot for examples of downscale and upscale which show that it should read < 1 and > 1.