A legitimate, comprehensive manual will typically break down as follows:
Standardized symbols that indicate valve positions (open/closed), fluid levels, and electrical bus status. 737 NG Synoptics Training Manual.zip
A "synoptic" refers to the system-specific pages displayed on the lower Display Unit (DU). These are the graphical representations of the aircraft's hydraulic systems, fuel distribution, electrical buses, flight controls, and environmental control systems. Unlike raw data, a synoptic diagram provides a "big picture" view—a schematic that shows the pilot exactly where fuel is flowing, which hydraulic pumps are pressurized, and where electrical failures have occurred. A legitimate, comprehensive manual will typically break down
737 NG Synoptics Training Manual Version 1.0 - [DATE] which hydraulic pumps are pressurized