Can I add or change the group administrator?

Please refer to the following manual on how to do this.

▼Change group administrator (Web Browser)
https://teachme.jp/8/manuals/9030824/

Please note that there is only one group administrator in the group.
However, you can add group sub-administrators who have similar authority over the group.

▼ Assign group sub-administrator (Web Browser)
https://teachme.jp/8/manuals/5009378/