(03-12-2025, 10:46 PM)Sygon_Paul Wrote: Thank you for the replies. About two hours after I asked, I discovered that jpg doesn't support transparency. I also learned I was doing something wrong in LibreOffice, and I can use png files. It wasn't wasted time, as I discovered a few tools in GIMP to remove the white box frame behind the image. Unfortunately, those tools washed out some white in the main part, so I removed the white background by hand.
There may be a better idea, but what I have now is working as intended, even if it took me three and a half hours.
As you say, not a waste of time. You have learned something, there is usually more than one way for anything in Gimp. That is one of its strengths. Far better that some on-line site where you get what you are given and learn nothing.
Using your jpeg image, I did find that the usual color-to-alpha did leave some compression artifacts, so on to the next method widely used. - Fuzzy Select. All depends on the threshold value and is made visible using the threshold mask option.
example: https://i.imgur.com/FOZI8j3.mp4 about 40 seconds.
The main thing is avoid that white border that plagues new users (see reddit gimp pages
) and keep experimenting.