Customizing Take Command
Take Command is the GUI component, providing the tabbed console windows in which TCC, and other console programs like CMD.EXE and PowerShell run. It also provides file-management windows, a tabbed toolbar, and other graphical amenities, along with the framework they all fit into.
Many of Take Command's customization options are available in the Take Command configuration dialog, which you start with the "Configure Take Command..." selection in the Options menu. (Note that this is a different dialog from the OPTION dialog used to configure TCC.)