Posted by dellus on Jan 14, 2018; 9:15pm
URL: https://forum.librecad.org/Is-there-a-way-to-crop-images-using-a-polyline-or-something-similar-tp5715687p5715689.html

No, there isn't.
You have to crop the image or cut out the part you want with a graphics program outside of LibreCAD.
LibreCAD supports transparency in images, at least in png's, as I have found.