I tried, but couldn't find how to delete document presets, which I created. I just want to delete presets that I'm not using anymore when opening a new document. Thanks in advance
You can delete the actual .ait file, but I believe the custom widget that shows up under presets (i.e. if you created a 25px by 1000px .ait file) would still remain. If you are trying to get rid of the actual files, you would go to the place where they were saved on your computer in the first place.