Linux Mint Tricia 19.3 Yes I compiled it myself. I have reverted to the version provided by Mint (Geany 1.32), but it doesn't mention the GTK version it was built with. I remember with a previous version I had problems scrolling with the arrow up/down keys at the end of files with a large number of lines (> 1 million), but it seems I can't reproduce the problem right now. We'll see what happens. Does Geany retain its speed with GTK3 ?