Mouse data in data files

Hi! Hopefully this is a quick question/answer: I'm looking at mouse data in the data files, e.g., /ML/Trial1/AnalogData/Mouse. These data are 4 x "however many samples". I think the first 2 rows are x and y positions, but its not clear to me what the other 2 rows are. My best guess is left and right click state or maybe row 3 is some button state and row 4 is the button identity. Are either of these right?

Thanks!

PS, I can't find documentation about the contents of the data files. Please let me know if I'm being dense and just missed something obvious somewhere.

They are [x_pos y_pos left_click right_click]. You could probably figure it out yourself if you tried plotting them.