RE: Customary prefix for custom keybindings

[Drew Adams]

> By official gnu emacs manual's guideline, (info "Key Binding
> Conventions") the key space for users are the function keys F5 to F9,
> and ?Ctrl+c ‹letter›?. that's it.

Those are _reserved_ for users.  But users can bind any keys they like.

That is, users not only can do that, but they are not discouraged from doing so.

Just be aware that other keys are not reserved, which means only that programs
are not discouraged from binding them.  You need to override any existing
binding for such a key that some library might make (instead of letting the
library override you ;-)).