The first item in the configuration menu reads:

Clinking on the link yields a rather long form. The top part of the form looks like this:

That's followed by a section that allows you to enable Manhattan's Spell Checker:

See Check Spelling for a brief description of Manhattan's spell checker. As described in that section, the Check Spelling button will not appear within your classroom unless you enable the feature.
The remainder of the form gives you the ability to select which modules you want to enable, and in some cases how you want them to behave. Since the form is so long, we'll show the remainder as text, rather than as a graphic image:
Which modules do you want to use? You can add and remove modules whenever you wish. Removing a module does NOT delete the data within the module!
Assignments
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Lectures
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Handouts/Notices
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Internet Resources
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Class Discussion
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Self-tests
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Anonymous Discussion
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Student Lounge
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Team Discussion
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Team/Teacher Discussion
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
Surveys
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
People
Enable this module
Post Office
Enable this module
Chat
Enable this module
Grades
Enable this module
You've probably already seen this form. It's the same form you use to activate a Manhattan classroom for the first time after it has been set up for you by the server administrator. You can come back here whenever you want to enable or disable any of Manhattan's modules.
The text entered in the Course-Code-Section, Course Title, Semester, and Instructor fields is displayed in various places throughout the Manhattan classroom. The purpose of this information is to let you and your students know which course they are working with as they use Manhattan. Except for the Semester information, it doesn't matter at all what you enter in these fields. "Apples are my favorite" is just as good as "CS 101" in the Course-code-section field for example. You can change these fields as often as you wish, without fear of losing or modifying any of the messages in your classroom. Reasonable limits have been placed on the lengths of these fields - if you type in a text string that is too long, you'll get an error message when you click on the Update Configuration button at the very bottom of the page.
However pay attention to the note on the form cautioning you about the Semester field. For normal (centralized) courses, changing the Semester information changes the way the course will be listed on the "My Manhattan" page - the page users see when they first login. If you changed the Semester field to "Apples", all of your students will have the course listed under the "Apples" heading in their "My Manhattan" page:

You'll note there are three options for most of the modules:
Disable this module
Enable this module, and allow users to hide/unhide topics
Enable this module, but don't allow user's to hide/unhide topics
The idea of allowing users to hide/unhide topics is discussed at length in Hiding and Unhiding Topics.