See the online man pages. At unix shell prompt type 'man vim' and 'man gvim'.
Or inside the gvim session type :help to get the help page. See also Vim Tutorial To see the settings type :set all or :set. To see list of options type :options. To see topics on set type :help set.
VIM - main help file Move around: Use the cursor keys, or "h" to go left, "j" to go down, "k" to go up, "l" to go right. ":1" takes you to 1st line of page ":n" takes you to nth line of page "<SHIFT>g" takes you to bottom of page ":/someword/ will search for "someword" in doc Close this window: Use ":q<Enter>". Jump to a subject: Position the cursor on a tag between |bars| and hit CTRL-]. With the mouse: ":set mouse=a" to enable the mouse (in xterm or GUI). Double-click the left mouse button on a tag between |bars|. jump back: Type CTRL-T or CTRL-O. Get specific help: It is possible to go directly to whatever you want help on, by giving an argument to the ":help" command |:help|. It is possible to further specify the context: WHAT PREPEND EXAMPLE ~ Normal mode commands (nothing) :help x Visual mode commands v_ :help v_u Insert mode commands i_ :help i_<Esc> command-line commands : :help :quit command-line editing c_ :help c_<Del> Vim command arguments - :help -r options ' :help 'textwidth' list of documentation files: |howto.txt| how to do the most common things |intro.txt| introduction to Vim |index.txt| alphabetical index for each mode |autocmd.txt| automatically executing commands on an event |change.txt| delete and replace text