In general, if you see red, you should call scheduling to inquire about it. Mesaba does not give us the right click "view comments" option that is available so we have no way to see the comments associated with the alert. Red is associated with things that would make you not avialable for duty such as, TVL - travelling to class, moving days etc, ADM - working in the office, UNM - out on disability, etc. You will see red as well for potential rest violations, duty time limits, flight time limits, training due, medical due, etc.