Nvim :help pages, generated from source using the tree-sitter-vimdoc parser.

Nvim nvim-intro
Nvim is based on Vim by Bram Moolenaar.
If you already use Vim see nvim-from-vim for a quickstart. If you are new to Vim, try the 30-minute tutorial:
Nvim is emphatically a fork of Vim, not a clone: compatibility with Vim (especially editor and Vimscript features) is maintained where possible. See vim-differences for the complete reference of differences from Vim.

Transitioning from Vim nvim-from-vim

1. To start the transition, create your init.vim (user config) file:
:call mkdir(stdpath('config'), 'p')
:exe 'edit '.stdpath('config').'/init.vim'
2. Add these contents to the file:
set runtimepath^=~/.vim runtimepath+=~/.vim/after
let &packpath = &runtimepath
source ~/.vimrc
3. Restart Nvim, your existing Vim config will be loaded.
See provider-python and provider-clipboard for additional software you might need to use some features.
Your Vim configuration might not be entirely Nvim-compatible (see vim-differences). For example the 'ttymouse' option was removed from Nvim, because mouse support is always enabled if possible. If you use the same vimrc for Vim and Nvim you could guard 'ttymouse' in your configuration like so:
if !has('nvim')
    set ttymouse=xterm2
And for Nvim-specific configuration, you can do this:
if has('nvim')
    tnoremap <Esc> <C-\><C-n>
For a more granular approach use exists():
if exists(':tnoremap')
    tnoremap <Esc> <C-\><C-n>
Now you should be able to explore Nvim more comfortably. Check nvim-features for more information.
portable-config Because Nvim follows the XDG base-directories standard, configuration on Windows is stored in ~/AppData instead of ~/.config. But you can still share the same Nvim configuration on all of your machines, by creating ~/AppData/Local/nvim/init.vim containing just this line:
source ~/.config/nvim/init.vim
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Quick reference