What is the content (open in Notepad) of “%LOCALAPPDATA%\Frontier Developments\Elite Dangerous\Options\Bindings\StartPreset.start”?
It has the word “custom”, that’s all.
Do you mean like a hotkey for marking (in game) a view rotation as “center”?
Like set the centre to a given point, so instead of it being default centre, set it slightly higher or even left or right of default in game centre.