Event Markers

I am working on a social judgement task using EEG. I need markers for the Response chosen (Yes or no) and markers for the arbitrary feedback as randomly generated by the system (Yes or no).
This way for analysis I will need 4 categories of EEG Segments based ob response chosen and feedback given i.e - Yes-Yes, Yes-No, No-Yes, No-No.
Kindly guide me how to mark these events on my EEG file using Superlab.
Thanks in advance.