I've often found that it is helpful to post a image with your MWE. In cases where you're using a single-Page MWE, ImageMagick's 'convert' utility does the trick. For multi-page MWEs (e.g. for questions on page-breaking), it's trickier. I would like to be able to produce something like this (from an answer by David Carlisle)
How should one do this?