Displaying the current Vim environment

You can display the current Vim environment (settings, options, commands, maps, etc) using the following commands:

:abbreviate   - list abbreviations:args         - argument list:augroup      - augroups:autocmd      - list auto-commands:buffers      - list buffers:breaklist    - list current breakpoints:cabbrev      - list command mode abbreviations:changes      - changes:cmap         - list command mode maps:command      - list commands:compiler     - list compiler scripts:digraphs     - digraphs:file         - print filename, cursor position and status (like Ctrl-G):filetype     - on/off settings for filetype detect/plugins/indent:function     - list user-defined functions (names and argument lists but not the full code):function Foo - user-defined function Foo() (full code list):highlight    - highlight groups:history c    - command history:history =    - expression history:history s    - search history:history      - your commands:iabbrev      - list insert mode abbreviations:imap         - list insert mode maps:intro        - the Vim splash screen, with summary version info:jumps        - your movements:language     - current language settings:let          - all variables:let FooBar   - variable FooBar:let g:       - global variables:let v:       - Vim variables:list         - buffer lines (many similar commands):lmap         - language mappings (set by keymap or by lmap):ls           - buffers:ls!          - buffers, including "unlisted" buffers:map!         - Insert and Command-line mode maps (imap, cmap):map          - Normal and Visual mode maps (nmap, vmap, xmap, smap, omap):map<buffer>  - buffer local Normal and Visual mode maps:map!<buffer> - buffer local Insert and Command-line mode maps:marks        - marks:menu         - menu items:messages     - message history:nmap         - Normal-mode mappings only:omap         - Operator-pending mode mappings only:print        - display buffer lines (useful after :g or with a range):reg          - registers:scriptnames  - all scripts sourced so far:set all      - all options, including defaults:setglobal    - global option values:setlocal     - local option values:set          - options with non-default value:set termcap  - list terminal codes and terminal keys:smap         - Select-mode mappings only:spellinfo    - spellfiles used:syntax       - syntax items:syn sync     - current syntax sync mode:tabs         - tab pages:tags         - tag stack contents:undolist     - leaves of the undo tree:verbose      - show info about where a map or autocmd or function is defined:version      - list version and build options:vmap         - Visual and Select mode mappings only:winpos       - Vim window position (gui):xmap         - visual mode maps only

http://vim.wikia.com/wiki/Displaying_the_current_Vim_environment