Continuous media  | Used for items like receipts. Has no marks to define print length.  | 
Marked media  | Has black lines, black marks, notches, or holes to define the print length for each printed item.   | 
Label media  | Uses the sensor to look through the media backing (liner) to see the beginning and end of labels on the roll.   | 
Center area transmissive sensing   | For continuous media and gap/web label media.   | 
Half-width movable (reflective) sensing   | To sense print format (length) using the black marks, black lines, notches, or holes present on the media.   |