IgorV pointed out that while our manual still describes multiple projector keyframes/boxes in compositor it doesn't (reliably?) work this way, namely I think I created second box somehow but can't reproduce :) https://cinelerra-gg.org/download/CinelerraGG_Manual/Compositor_Keyframes.ht... "Move the projector slightly in the compositor window to create a keyframe. Then go forward several seconds. Move the projector a long distance to create another keyframe and emphasize motion. This creates a second projector box in the compositor, with a line joining the two boxes. The joining line is the motion path. If you create more keyframes, more boxes are created. Once all the desired keyframes are created, disable automatic keyframe mode." small video describing how it worked in cinelerra-cv 1.2.1 using old dynebolic 1.4 iso https://m.youtube.com/watch?v=08UCImr82CE I wonder how "long" must be long distance? offscreen? tried this, also with enlarged projector range .... no two boxes! I can't even see this behavior in cincv 2.3.* from 2017, but may be I am doing it wrong for all versions?