MyChat has a command line in the system window where you can enter text console commands. The letter case does not matter; commands can be with small and big letters. You can open console by selecting the tab "Conferences" and pressing the button 
, or by combination "Ctrl+~":
Console commands are divided into two classes: common and administrative (can be set on MyChat Server, in the section "Administration" -> "Rights control" -> "Permission groups" -> "Administering" -> "Server remote administering through the MyChat Client console").
List of console commands in MyChat
Program configuration, working with console, service commands and help information.