GridGammon provides a simple command line interface in the Lobby and Board windows. Commands begin with the slash character ('/').
Slash commands allow you to send two special chat messages, for example, typing:
/whisper That was an interesting move.
while watching a match sends the whisper message to the other watchers, but not to the two players.
You can use slash commands to invite a player, open an Info window for the player, or chat with the player. For example,
/info <player>
opens an info window for the player.
To see the complete list of commands available in the Board or Lobby window, type '/help'. Commands may be shortened as long as there is no ambiguity, for example you can type '/ver <player>' for the /version command.
Two common slash commands have simple shortcuts: starting a chat message with an asterisk (*) is the equivalent to /tell, and starting with a comma (,) is equivalent to /emote.