FMC "SUPP NAV DATA" PAGE QUESTION
 

Anybody knows if possible to check the created waypoints into supplemental database storage?

For 737 FMC:

Yes it is, from 737NG AOM:

The supplemental nav. data base is accessed by typing SUPP in the scratchpad while on the INIT/REF page, then selecting the NAV DATA prompt (LSK 1R). Acces only on the ground.

Greetz, Track