I've got two clouds in my AC 9 Library: one is called "Cloud Rectangle" ... and it will stretch. The other is "Redline Cloud Rect" ...it doesn't stretch. Both are in the Graphic symbols folder.
BUT, read this post and you won't need either one:
http://archicad-talk.graphisoft.com/viewtopic.php?t=5611&postdays=0&postorder=asc&&start=0&sid=5c9c6...
Marc Corney, Architect
Red Canoe Architecture, P. A.
Mac OS 10.15.7 (Catalina) //// Mac OS 14.5 (Sonoma)
Processor: 3.6 GHz 8-Core Intel Core i9 //// Apple M2 Max
Memory: 48 GB 2667 MHz DDR4 //// 32 GB
Graphics: Radeon Pro 580X 8GB //// 12C CPU, 30C GPU
ArchiCAD 25 (5010 USA Full) //// ArchiCAD 27 (4030 USA Full)