Warnings

'End time warning' - user will be warned before his session ends in preset time.
'Traffic completion warning' message appears, when less then indicated value of traffic left.
'Add/change time message' appears when new session starts, or current session changes (prolonged). If you include "%H" ,"%M", "%S" string, left time will appear.
'CTRL+F12' message - pressing this combination user can see time before his session ends. String "%H" ,"%M", "%S" must be included in message, to show time.

See Quick messages to learn more about messages parameters.