How to save a picture in a different size than the default? I’m trying different settings and it does not work.
Read the friendly manual: http://rawpedia.rawtherapee.com/
If after reading it you still have a problem, describe exactly what you did, show a screenshot, upload the PP3 file, and write which version of RawTherapee you’re using.
You may have forgotten to activate the Resize module (by clicking on the button next to “Resize”):
