With the menus
Show (or Left and Right in old style menu) you can set some options for the current file window, such as the sort order or the type of the displayed files. In the menu
Files you find some additional file commands. In the menu
Commands you can start further actions which cannot reached with the function keys, such as starting DOS or finding files. The menu
Net contains commands for the local area network and the Internet (FTP). The menu
Configuration allows you to configure Total Commander to your needs.