Choose the desired location of the navigation buttons within the iframe.

Check this option to show the Google Voice Number in the Header for easy reference.

Choosing this option allows non-app elements to be loaded into Google Apps

Choose which of the Google standard headers to load in the element. When possible, you may choose to simply remove the Google standard headers.

Checking this option enables the HotKeys (z and shift-z) for collapsible headers/sidebars.

Enter the desired size of the element in pixels. When available, you can choose to have the box automatically sized to fit its content instead.

Checking this option enables ScheduleOnce, allowing you to schedule your meetings with ease by quickly finding a time that works for all attendees.

Checking this option causes the program to recall the previous state of the box in question and restore this state upon reloading of GMail. Allowing some programs to load in a collapsed state may cause text to become unreadable.

Checking this option forces a secure (https) connection to be used.

Sets whether to show favicons in the title bar of the Integrated Gmail elements. Thanks to Peter Wooley you have the option to show unread counts in the favicons for the main inbox and Google reader.