I see that Maretron’s DSM150, DSM200, and DSM250 displays have a GPS100 configuration setting called "Reset Factory Defaults"; what is this?

Maretron’s DSM150, DSM200, and DSM250 displays have a GPS100 configuration setting called "Restore Factory Defaults", which is used to return the GPS100 to its factory settings. Resetting the GPS100 resets the SBAS mode back to enabled, resets the GPS mode back to Auto, resets the elevation mask back to 0°, resets the PDOP mask to disabled, resets the SNR mask to disabled, resets the antenna altitude to use the altitude of the last 3D fix, and returns PGN enable/disable settings back to the factory defaults.