Click on the wrench across from the section name to edit characteristics of a section.

You cannot rename a section that is part of a managed object, but you can change the layout from 2 columns to 1, and set the tab-key order.

You can determine whether or not a section appears when you are in the edit mode.

Sections can also be dragged and dropped to different locations on the page layout.

If you don't like where they wound up, hit CTRL-Z to undo the move.

You then define its section properties and can give it a section name.

1.  Create a new section with the name you want to use

2.  Drag it onto the layout

3.  Drag the fields from the managed section, to your new one.

4.  Remove the old section from the layout!