The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
I previously asked Zepto and they said that no manual exists. However, it need to be written. There's an amazing number of options in that BIOS and some might be useful. At present we have to make do with a few words of explanation on the right side of each BIOS page. Half of the problem is that there are many abbreviations in those descriptions.
Someone in the Zepto / ODM should prepare a simple guide with some explanations.
One undocumented feature which Rene previously advised is that pressing F10 during the Zepto splash screen brings up a list of boot devices for a one-time boot selection.
Problems? See this thread at archive.org.
