Loading Sheet Film
Typically, sheet film has a set of notches on one of the narrow edges. These identify the film. Usually the box in which the film shipped tells you the notch code for the film enclosed. This is particularly useful when you're in the dark-room loading developing hangers trying to remember what kind of film was in the holder. You can just turn on the light and look at the box, right?
The easiest way to load a sheet film holder for shooting is to position the sheet of film as illustrated, with the notches in the upper right hand corner. This will position the film with the emulsion side out.