J.P. Instruments EDM 740 Pilots Guide - Manual (Page 40)

Page 40 Engine Data Management
Example B: Aircraft has two MAIN and two AUX tanks.
You’ve preset: ‘MAIN = 60’ (30 + 30 usable)
‘AUX = 14’ (7 + 7 usable)
When you refuel:
‘FILL 60’: use this shortcut when filling only MAIN tanks (! AUX
tanks must be empty).
‘FILL 74’: use this shortcut when filling MAIN and AUX tanks.
(only one wing shown in each of the two scenarios)