To create your own category headers and descriptions (sorting characteristics), go into Explore and open the bravadj.cat file in the MusicMatch subdirectory using Notepad. This file will display all current default categories, which can then be edited to fit your personal descriptions. Be sure to save your file changes. Changes will appear after restarting your program.
You may also change column width from within the database. Using your mouse, click and hold on the top of the column to drag the width to your desired size.