VIM: usr_02

## USR_02

    *usr_02.txt*	For Vim version 6.1.  Last change: 2001 Sep 03

    		     VIM USER MANUAL - by Bram Moolenaar

    			    The first steps in Vim

    This chapter provides just enough information to edit a file with Vim.  Not
    well or fast, but you can edit.  Take some time to practice with these
    commands, they form the base for what follows.

    |02.1|	Running Vim for the First Time
    |02.2|	Inserting text
    |02.3|	Moving around
    |02.4|	Deleting characters
    |02.5|	Undo and Redo
    |02.6|	Other editing commands
    |02.7|	Getting out
    |02.8|	Finding help

         Next chapter: |usr_03|  Moving around
     Previous chapter: |usr_01|  About the manuals
    Table of contents: |usr_toc|

    *02.1*	Running Vim for the First Time

    To start Vim, enter this command:

    	gvim file.txt

    In UNIX you can type this at any command prompt.  If you are running Microsoft
    Windows, open an MS-DOS prompt window and enter the command.
       In either case, Vim starts editing a file called file.txt.  Because this
    is a new file, you get a blank window. This is what your screen will look
    like:

    	+---------------------------------------+
    	|#					|
    	|~					|
    	|~					|
    	|~					|
    	|~					|
    	|"file" [New file]			|
    	+---------------------------------------+
    		('#" is the cursor position.)

    The tilde (~) lines indicate lines not in the file.  In other words, when Vim
    runs out of file to display, it displays tilde lines.  At the bottom of the
    screen, a message line indicates the file is named file.txt and shows that you
    are creating a new file.  The message information is temporary and other
    information overwrites it.

    THE VIM COMMAND

    The gvim command causes the editor to create a new window for editing.  If you
    use this command:

    	vim file.txt

    the editing occurs inside your command window.  In other words, if you are
    running inside an xterm, the editor uses your xterm window.  If you are using
    an MS-DOS command prompt window under Microsoft Windows, the editing occurs
    inside this window.  The text in the window will look the same for both
    versions, but with gvim you have extra features, like a menu bar.  More about
    that later.

    *02.2*	Inserting text

    The Vim editor is a modal editor.  That means that the editor behaves
    differently, depending on which mode you are in.  The two basic modes are
    called Normal mode and Insert mode.  In Normal mode the characters you type
    are commands.  In Insert mode the characters are inserted as text.
       Since you have just started Vim it will be in Normal mode.  To start Insert
    mode you type the "i" command (i for Insert).  Then you can enter
    the text.  It will be inserted into the file.  Do not worry if you make
    mistakes; you can correct them later.  To enter the following programmer's
    limerick, this is what you type:

    	iA very intelligent turtle
    	Found programming UNIX a hurdle

    After typing "turtle" you press the <Enter> key to start a new line.  Finally
    you press the <Esc> key to stop Insert mode and go back to Normal mode.  You
    now have two lines of text in your Vim window:

    	+---------------------------------------+
    	|A very intelligent turtle		|
    	|Found programming UNIX a hurdle	|
    	|~					|
    	|~					|
    	|					|
    	+---------------------------------------+

    WHAT IS THE MODE?

    To be able to see what mode you are in, type this command:

    	:set showmode

    You will notice that when typing the colon Vim moves the cursor to the last
    line of the window.  That's where you type colon commands (commands that start
    with a colon).  Finish this command by pressing the <Enter> key (all commands
    that start with a colon are finished this way).
       Now, if you type the "i" command Vim will display --INSERT-- at the bottom
    of the window.  This indicates you are in Insert mode.

    	+---------------------------------------+
    	|A very intelligent turtle		|
    	|Found programming UNIX a hurdle	|
    	|~					|
    	|~					|
    	|-- INSERT --				|
    	+---------------------------------------+

    If you press <Esc> to go back to Normal mode the last line will be made blank.

    GETTING OUT OF TROUBLE

    One of the problems for Vim novices is mode confusion, which is caused by
    forgetting which mode you are in or by accidentally typing a command that
    switches modes.  To get back to Normal mode, no matter what mode you are in,
    press the <Esc> key.  Sometimes you have to press it twice.  If Vim beeps back
    at you, you already are in Normal mode.

    *02.3*	Moving around

    After you return to command mode, you can move around by using these keys:

    	h   left
    	j   down
    	k   up
    	l   right

    At first, it may appear that these commands were chosen at random.  After all,
    who ever heard of using l for right?  But actually, there is a very good
    reason for these choices: Moving the cursor is the most common thing you do in
    an editor, and these keys are on the home row of your right hand.  In other
    words, these commands are placed where you can type them the fastest
    (especially when you type with ten fingers).

    	Note:
    	You can also move the cursor by using the arrow keys.  If you do,
    	however, you greatly slow down your editing because to press the arrow
    	keys, you must move your hand from the text keys to the arrow keys.
    	Considering that you might be doing it hundreds of times an hour, this
    	can take a significant amount of time.
    	   Also, there are keyboards which do not have arrow keys, or which
    	locate them in unusual places; therefore, knowing the use of the hjkl
    	keys helps in those situations.

    One way to remember these commands is that h is on the left, l is on the
    right and j points down.  In a picture:

    		       k
    		   h     l
    		     j

    The best way to learn these commands is by using them.  Use the "i" command to
    insert some more lines of text.  Then use the hjkl keys to move around and
    insert a word somewhere.  Don't forget to press <Esc> to go back to Normal
    mode.  The |vimtutor| is also a nice way to learn by doing.

    *02.4*	Deleting characters

    To delete a character, move the cursor over it and type "x".  (This is a
    throwback to the old days of the typewriter, when you deleted things by typing
    xxxx over them.)  Move the cursor to the beginning of the first line, for
    example, and type xxxxxxx (seven x's) to delete "A very ".  The result should
    look like this:

    	+---------------------------------------+
    	|intelligent turtle			|
    	|Found programming UNIX a hurdle	|
    	|~					|
    	|~					|
    	|					|
    	+---------------------------------------+

    Now you can insert new text, for example by typing:

    	iA young <Esc>

    This begins an insert (the i), inserts the words "A young", and then exits
    insert mode (the final <Esc>).	The result:

    	+---------------------------------------+
    	|A young intelligent turtle		|
    	|Found programming UNIX a hurdle	|
    	|~					|
    	|~					|
    	|					|
    	+---------------------------------------+

    DELETING A LINE

    To delete a whole line use the "dd" command.  The following line will
    then move up to fill the gap:

    	+---------------------------------------+
    	|Found programming UNIX a hurdle	|
    	|~					|
    	|~					|
    	|~					|
    	|					|
    	+---------------------------------------+

    DELETING A LINE BREAK

    In Vim you can join two lines together, which means that the line break
    between them is deleted.  The "J" command does this.
       Take these two lines:

    	A young intelligent
    	turtle

    Move the cursor to the first line and press "J":

    	A young intelligent turtle

    *02.5*	Undo and Redo

    Suppose you delete too much.  Well, you can type it in again, but an easier
    way exists.  The "u" command undoes the last edit.  Take a look at this in
    action: After using "dd" to delete the first line, "u" brings it back.
       Another one: Move the cursor to the A in the first line:

    	A young intelligent turtle

    Now type xxxxxxx to delete "A young".  The result is as follows:

    	 intelligent turtle

    Type "u" to undo the last delete.  That delete removed the g, so the undo
    restores the character.

    	g intelligent turtle

    The next u command restores the next-to-last character deleted:

    	ng intelligent turtle

    The next u command gives you the u, and so on:

    	ung intelligent turtle
    	oung intelligent turtle
    	young intelligent turtle
    	 young intelligent turtle
    	A young intelligent turtle

    	Note:
    	If you type "u" twice, and the result is that you get the same text
    	back, you have Vim configured to work Vi compatible.  Look here to fix
    	this: |not-compatible|.
    	   This text assumes you work "The Vim Way".  You might prefer to use
    	the good old Vi way, but you will have to watch out for small
    	differences in the text then.

    REDO

    If you undo too many times, you can press CTRL-R (redo) to reverse the
    preceding command.  In other words, it undoes the undo.  To see this in
    action, press CTRL-R twice.  The character A and the space after it disappear:

    	young intelligent turtle

    There's a special version of the undo command, the "U" (undo line) command.
    The undo line command undoes all the changes made on the last line that was
    edited.  Typing this command twice cancels the preceding "U".

    	A very intelligent turtle
    	  xxxx				Delete very

    	A intelligent turtle
    		      xxxxxx		Delete turtle

    	A intelligent
    					Restore line with "U"
    	A very intelligent turtle
    					Undo "U" with "u"
    	A intelligent

    The "U" command is a change by itself, which the "u" command undoes and CTRL-R
    redoes.  This might be a bit confusing.  Don't worry, with "u" and CTRL-R you
    can go to any of the situations you had.

    *02.6*	Other editing commands

    Vim has a large number of commands to change the text.  See |Q_in| and below.
    Here are a few often used ones.

    APPENDING

    The "i" command inserts a character before the character under the cursor.
    That works fine; but what happens if you want to add stuff to the end of the
    line?  For that you need to insert text after the cursor.  This is done with
    the "a" (append) command.
       For example, to change the line

    	and that's not saying much for the turtle.
    to
    	and that's not saying much for the turtle!!!

    move the cursor over to the dot at the end of the line. Then type "x" to
    delete the period.  The cursor is now positioned at the end of the line on the
    e in turtle.  Now type

    	a!!!<Esc>

    to append three exclamation points after the e in turtle:

    	and that's not saying much for the turtle!!!

    OPENING UP A NEW LINE

    The "o" command creates a new, empty line below the cursor and puts Vim in
    Insert mode.  Then you can type the text for the new line.
       Suppose the cursor is somewhere in the first of these two lines:

    	A very intelligent turtle
    	Found programming UNIX a hurdle

    If you now use the "o" command and type new text:

    	oThat liked using Vim<Esc>

    The result is:

    	A very intelligent turtle
    	That liked using Vim
    	Found programming UNIX a hurdle

    The "O" command (uppercase) opens a line above the cursor.

    USING A COUNT

    Suppose you want to move up nine lines.  You can type "kkkkkkkkk" or you can
    enter the command "9k".  In fact, you can precede many commands with a number.
    Earlier in this chapter, for instance, you added three exclamation points to
    the end of a line by typing "a!!!<Esc>".  Another way to do this is to use the
    command "3a!<Esc>".  The count of 3 tells the command that follows to triple
    its effect.  Similarly, to delete three characters, use the command "3x".  The
    count always comes before the command it applies to.

    *02.7*	Getting out

    To exit, use the "ZZ" command.  This command writes the file and exits.

    	Note:
    	Unlike many other editors, Vim does not automatically make a backup
    	file.  If you type "ZZ", your changes are committed and there's no
    	turning back.  You can configure the Vim editor to produce backup
    	files, see |07.4|.

    DISCARDING CHANGES

    Sometimes you will make a sequence of changes and suddenly realize you were
    better off before you started.  Not to worry; Vim has a
    quit-and-throw-things-away command.  It is:

    	:q!

    Don't forget to press <Enter> to finish the command.

    For those of you interested in the details, the three parts of this command
    are the colon (:), which enters command mode; the q command, which tells the
    editor to quit; and the override command modifier (!).
       The override command modifier is needed because Vim is reluctant to throw
    away changes.  If you were to just type ":q", Vim would display an error
    message and refuse to exit:

    	E37: No write since last change (use ! to override)

    By specifying the override, you are in effect telling Vim, "I know that what
    I'm doing looks stupid, but I'm a big boy and really want to do this."

    If you want to continue editing with Vim: The ":e!" command reloads the
    original version of the file.

    *02.8*	Finding help

    Everything you always wanted to know can be found in the Vim help files.
    Don't be afraid to ask!
       To get generic help use this command:

    	:help

    You could also use the first function key <F1>.  If your keyboard has a <Help>
    key it might work as well.
       If you don't supply a subject, ":help" displays the general help window.
    The creators of Vim did something very clever (or very lazy) with the help
    system: They made the help window a normal editing window.  You can use all
    the normal Vim commands to move through the help information.  Therefore h, j,
    k, and l move left, down, up and right.
       To get out of the help window, use the same command you use to get out of
    the editor: "ZZ".  This will only close the help window, not exit Vim.

    As you read the help text, you will notice some text enclosed in vertical bars
    (for example, |help|).  This indicates a hyperlink.  If you position the
    cursor anywhere between the bars and press CTRL-] (jump to tag), the help
    system takes you to the indicated subject. (For reasons not discussed here,
    the Vim terminology for a hyperlink is tag.  So CTRL-] jumps to the location
    of the tag given by the word under the cursor.)
       After a few jumps, you might want to go back.  CTRL-T (pop tag) takes you
    back to the preceding position.  CTRL-O (jump to older position) also works
    nicely here.
       At the top of the help screen, there is the notation *help.txt*.  This name
    between "*" characters is used by the help system to define a tag (hyperlink
    destination).
       See |29.1| for details about using tags.

    To get help on a given subject, use the following command:

    	:help {subject}

    To get help on the "x" command, for example, enter the following:

    	:help x

    To find out how to delete text, use this command:

    	:help deleting

    To get a complete index of all Vim commands, use the following command:

    	:help index

    When you need to get help for a control character command (for example,
    CTRL-A), you need to spell it with the prefix "CTRL-".

    	:help CTRL-A

    The Vim editor has many different modes.  By default, the help system displays
    the normal-mode commands.  For example, the following command displays help
    for the normal-mode CTRL-H command:

    	:help CTRL-H

    To identify other modes, use a mode prefix.  If you want the help for the
    insert-mode version of a command, use "i_".  For CTRL-H this gives you the
    following command:

    	:help i_CTRL-H

    When you start the Vim editor, you can use several command-line arguments.
    These all begin with a dash (-).  To find what the -t argument does, for
    example, use the command:

    	:help -t

    The Vim editor has a number of options that enable you to configure and
    customize the editor.  If you want help for an option, you need to enclose it
    in single quotation marks.  To find out what the 'number' option does, for
    example, use the following command:

    	:help 'number'

    The table with all mode prefixes can be found here: |help-context|.

    Special keys are enclosed in angle brackets. To find help on the up-arrow key
    in Insert mode, for instance, use this command:

    	:help i_<Up>

    If you see an error message that you don't understand, for example:

    	E37: No write since last change (use ! to override)

    You can use the error ID at the start to find help about it:

    	:help E37

    Next chapter: |usr_03|  Moving around

    Copyright: see |manual-copyright|  vim:tw=78:ts=8:ft=help:norl:

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