11:11:40maxzIncremental redisplay does not work in my use case due to a heavy performance hit compared to a full redraw. I guess this is a bug but I have to create a proper minimal program which displays the behaviour.
11:16:09maxzSCROLL-SPACE-REQUIREMENTS works in the example program, but not in my real program. So I will have to investigate. There is no obvious reason to me right now.
11:58:57maxzHaving to call SCROLL-SPACE-REQUIREMENTS before calling SCROLL-EXTENT seems a bit counter-intuitive and is not apparent from the documentation. But I guess the performance hit of always calling SCROLL-SPACE-REQUIREMENTS within SCROLL-EXTENT would be too high.