When flying on fires, 90% of the time we have the right door off, therefore the knee board on the right a leg is not the most secure, and it gets in the way of the collective on the left leg---therefore, it is easier to just write stuff on the window. More importantly, I just dont like knee boards--they are too bulky, and never seemed to fit right. Another plus to the window is the information remains when the relief pilot fly. I am also not talking novels either--normally just frequencies and stuff like that. Sometimes I also draw an outline of the fire and annotate the division breaks on it.