Thanks for your reply @Kroc . Safety is important, of course. I was not hoping for an upload feature, merely an option to hotlink, e.g. to imgur. Limiting to certain modes sounds reasonable. Unfortunately, I am not a programmer (just a sysadmin). I thought there might be a way to extend the markup but it seems it's only possible by hacking the source?
:: @xebeche added on 20 Jan ’22 · 23:40
BTW, this is not supposed to be a feature request. For now, it was a test, and only your kind reply got me thinking more. So thanks again!