You can do 2 things with the footer.
Save and close
Save and close saves the current settings and sends Iris to the tray.
Use Advanced Settings
If this checkbox is clicked Advanced view will be shown.
From here you can customize everything in Iris, but you need Iris Pro to enter some pages and customize some settings.
Since I don’t want to place ads or to sell user data some features of Iris are paid, but I try to make everybody happy. For most people the modes and types in the Simple view are completely fine.
If you want to access the locked sections in the Advanced view you can buy Iris Pro activation code from the Buy page.