Paxar 9474 - Manual (Page 87)

When measuring aperture supplies and black mark supplies,
measure from top to top as shown.
3. Sketch each field in the location you want it on the format. To
estimate the size of each field, you need to know the
◆ field type (bar code, line, graphics, or text)
◆ maximum number of characters you want the operator to
enter
◆ font style and size
◆ which direction the field will print (see "Setting the Top of
Field" and "Setting the Top of Character").
There is a Supply Layout form for metric measurement and
one for English measurement. You can use either one. The
supply for the sample tag sketched below is 1.5 inches wide
by 1.5 inches long.
Aperture
Measurement
Tag
Length Tag
Length
Black Sensor Mark
Measurement
6-4 Designing and Entering a Format