You can send messages to other players. These messages will be sent when the host runs, and receivers can read them next turn.

Choose races to send message to, or U to send a universal message (to everyone). You'll be placed in the message editor:

  • Arrows: Move around
  • Enter: Start new line
  • CtrlY: Delete line
  • AltT: Change receiver of message
  • F10: Send message

Alternatively, press R in the receiver selection window to revise previously-sent messages.

Reference

Keys:
W from race screen