ModuleManager-How-to-access-administrator-module
From Joomla! Documentation
To 'add' a new administrator {{{module}}} module or 'edit' an existing administrator {{{module}}} module, navigate to the Module Manager, then switch to Administrator from Site:
- Select Extensions → Module Manager
- Click Administrator to switch list from site modules to a list of administrator modules
Click the 'New' button and click on administrator {{{module}}} in the modal popup window.
To 'Edit' an existing administrator {{{module}}} module, in the Module Manager click on the {{{module}}} Module's Title or click the {{{module}}} module's check box and then click the Edit button in the Toolbar.