An admin level user can modify the security settings for another user from the Users grid. Hover over the organization's name and click on Users, then AssociationSphere Users.
From this grid, click on the row of the user to modify, then click on View/Edit, then Security Settings.
Here you can select what access the user will have for each module or activity by using the arrow in each drop down box. To learn more about the different settings, see the article https://support.associationsphere.com/en/support/solutions/articles/67000736417-user-rights-overview-and-access-levels. Click Save to save your changes or Cancel to return to the previous screen without saving.