First use the various menu options to configure DSO Nano any way you prefer (e.g. Hide Ref).
Then choose menu “FI” and sub-option “Save Pro”. Choose profile 0 (S Flash) and press “B” (or long “M”). This will save all active settings to DSO internal flash memory for use as power on defaults.
Profiles other than 0 (e.g. S 001.CFG ) will be saved to SD card and can be recalled with sub-option “Load Pro”.