Not sure if this exists? But it would be very handy for my work to have a function/tool that allows you to crop any negative space, down to the boundaries of the artwork itself, even better would be this, but also able to set a boundary by pixel of negative space all around the image.
First image is a rough example of something I would start with, 2nd image would be after clicking one button - the crop boundaries go to the edges of the artwork. The 3rd example is the same but have set a pixel boundary of negative space to 2 px.