Neovim help system

the main command is :h which should open help.txt if given no arguments; this should be enough if you want to explore much of Neovim itself as the document has an index of tutorials and local additions (most likely from the installed plugins)
the help documents are written in a custom formatting language that is recognized as a separate filetype; in addition to navigating the buffer like any other buffer, you can also run gO to show the table of contents
if given an argument, Vim will open the section of the document with the closest match
some points of interest
- you can view the complete listing of help tags with help-tags
- there is also a index of tags from index.txt
- you can easily get the keybind with CTRL-V (e.g., CTRL-V then META-D will quickly print the keymap)
- tab completion is present