The easiest way to manage and edit back-end usergroups is via the List view in the Web module.
Under the Group option for the user, we have the option to edit the selected group, create a new group, or list the groups. If we click the List groups button, we are taken to a screen that lists the groups, so we can manage and edit them easily. Here is the screenshot:
The groups are listed at the top under back-end usergroups. We can gain an overview of which groups have particular values for particular settings, by selecting some settings to compare from the list beneath the groups, and clicking Set fields. For instance, by selecting Grouptitle, Disable, and Modify options, and then clicking the Set fields button, the back-end usergroup table gains these fields to compare the different groups. Here is the screenshot:
If we click on a group's icon, we get the context menu, which we often see in the page tree view:
From this menu we can create new groups, edit the group...