With this script you can open and close single or multiple groups in 3ds max. There is also a possibility to select all object in the scene – the “select all” Button. This script is tested at 3ds max 2016 and 3ds max 2021. Script category: “#todorScripts”. You can downlod it from my website:
todor · 2019-12-14My script open the hierarchy - groups in groups - all of them. Tha macro from "Group -> Open" - dont! You are welcome to test it. :)