When you close Pixelmator with multiple files open you can "review changes". Adding an option there "Delete all" would speed things up if you don't want any of the open documents to be saved.
(my workflow: since I use Image Capture to scan to Pixelmator all day long, then export the images immediately as .jpg, I am stuck with dozens of open files at the end of the day which I don't want to keep. I have to spend 5 minutes daily pressing "delete" for every file)
option "delete all" when reviewing changes
2021-08-20 09:58:52