It is possible to include IATA Service Type when sending ASM or SSIM messages from Leon.
The 1st step is to enable this functionality by marking a checkbox in the Admin panel, section 'Flight Editing'. In the same section it's possible to define a default IATA Service type
All available IATA Service types are explained in the screenshot on the right.
When enabled, the IATA Service type will show for each flight in the 'OPS' panel, tab 'FLIGHT'- it can be manually changed if necessary.
It also shows in the panel SCHED (when creating or modifying the schedule).
The main section where the IATA Service type will be especially useful is sending the ASM message window from the SHOW SCHEDULE panel.