[ubuntu] Search documents in re VirtualBox 6.1.10

Hi all,

VirtualBox 6.1.10
Host - Ubuntu 18.04
VMs - Ubuntu 20.04 and 18.04

Could folks here guide me finding VirtualBox document, Linux host and VMs, particularly;
- Create New Group and delete Group
- Move VMs around on their group and to another group
etc.

Thanks.

What I can find are following 2 documents:
Oracle® VM VirtualBox®
User Manual
Oracle Corporation
Copyright © 2004-2020 Oracle Corporation
https://www.virtualbox.org/manual/UserManual.html

VirtualBox
https://wiki.archlinux.org/index.php/VirtualBox

Regards