The files in vim/settings are customizations stored on a per-plugin
basis. The main keymap is available in yadr-keymap.vim, but some of the vim
files contain key mappings as well.
If you are having unexpected behavior, wondering why a particular key works the way it does,
use: :map [keycombo] (e.g. :map <C-\>) to see what the key is mapped to. For bonus points, you can see where the mapping was set by using :verbose map [keycombo].
If you omit the key combo, you'll get a list of all the maps. You can do the same thing with nmap, imap, vmap, etc.