I drag an image into inkscape.
I make a small square inside the image.
I want to create a rectangular hole in the image.
How?
How do you remove the inside of a bitmap/png/image?
Re: How do you remove the inside of a bitmap/png/image?
The best way is to use a clipping path. For what you want to do you'll need an "inverse" clipping path - but unfortunately the SVG standard has no way to do this natively. Instead you'll have to construct an inverse path by removing it from a larger path. See part 13 of my tutorial series, where I do exactly that but using an oval rather than a rectangle:
viewtopic.php?f=6&t=11981
viewtopic.php?f=6&t=11981