Crop tool : constrain rectangle within source image boundaries

[Tilmann]

This is a VERY long standing issue, but apparently still not addressed by DxO:

Crop tool limit to (rotated) picture area

There should be a switch to limit the crop edges to the area of a tilted / rotated image. With rotated images, you currently can extend the crop area beyond the image border and then you get a black triangle shaped area. Although this might be desirable under certain circumstances, I guess most people don’t want to see the black triangles. Automatic crop does not cover all needs: I often want to have a smaller crop area than the maximum area, or to move the maximized crop area off the center. …

The votes of these two feature requests should be added.

IMHO, this is an absolutely basic function which is so self-evident that I really don’t know why we are talking about this for more than two years now…