The Settings module creates global and user configurable variables per deployment (or user) on Talos.
Documentation on how settings work can be viewed in each module.
All superusers will have a "Settings Editor" view present in the header menu.
The "Settings Editor" contains a selector on the left that allows you to select the module you wish to edit preferences for. The middle and right panes change depending on the selected module.
The middle pane contains the preferences that are editable and changeable.
The right pane has buttons per permission group that allows you to grant (and rescind) permissions accordingly. This is likely easier than going through the backend admin view to mess with permissions.