These options are no longer available in build 5.6.x or greater.
Hide and Show
You can hide and show different section of the interface to give you a better view of the sections you need when you need them.
Chart Creation
By default the chart creation section starts opened to allow you to setup the charts you'll need.
You can toggle it open and closed by pressing CTRL-F3.
Hide Chart Creation
The chart creation section can be collapsed when it isn't needed.
You can toggle it open and closed by pressing CTRL-F3.
Hide Playlists
You can also hide the playlists using the option in the playlists menu. This gives more space to the remaining Custom and Chart lists.