You can change permissions in the [Settings > Members] menu or [Settings > Organizations] menu.
The [Members] menu may not be visible depending on the user's permissions, and users can only change permissions for users with the same or lower permissions.
You can change Owner to Admin or Member in the [Members] menu. When changing permissions, you need to set the organization and permissions.
You can change Admin or Member to Owner in the [Members] menu. When permissions are changed, the owner has all permissions for organizations and billing.
You can change Member to Admin or Admin to Member in the [Members] and [Organizations] menus. When changing permissions, different permissions can be granted or changed depending on the organization the user belongs to.