Screen Options
There are more editing fields available to you than you see on first login. The Screen Options area allows you to choose which Post Fields are displayed or hidden from your editing area, which allows you to minimize clutter and customize according to your needs.
You’ll find the Screen Options tab at the very top of your screen, and if you click on it, you’ll see a list of available editing boxes that you can use. Check the box for each Post Field you want displayed, or uncheck the box to hide that module. Click the Screen Options tab again to close the tab.
Note: As of WordPress version 3.1, some screen options on the Post Administration Panel are hidden by default, and you can check these items to set them to display regularly. This includes: Excerpt, Post Author, Discussion, Custom Fields, Slug, Comments, Send Trackbacks, Revisions.
Once you’ve customized how your editing screen works, your options are saved so you don’t have to select or hide them again next time you log in.