non-digit. This
happens for the other modes as well: As soon as you type a character that is
invalid for the mode, the value before it will be used and the "invalid"
character is dealt with in the normal way.
If you enter a value of 10, it will end up in the file as a 0. The 10 is a
<NL>, which is used internally to represent the <Nul> character. When writing
the buffer to a file, the <NL> character is translated into <Nul>. The <NL>
character is written at the end of each line. Thus if you want to insert a
<NL> character in a file you will have to make a line break.
Also see 'fileformat'.
*i_CTRL-X* *insert_expand*
CTRL-X enters a sub-mode where several commands can be used. Most of these
commands do keyword completion; see |ins-completion|.
Two commands can be used to scroll the window up or down, without exiting
insert mode:
*i_CTRL-X_CTRL-E*
CTRL-X CTRL-E scroll window one line up.
When doing completion look here: |complete_CTRL-E|
*i_CTRL-X_CTRL-Y*
CTRL-X CTRL-Y scroll window one line down.
When doing completion look here: |complete_CTRL-Y|
After CTRL-X is pressed, each CTRL-E (CTRL-Y) scrolls the window up (down) by
one line unless that would cause the cursor to move from its current position
in the file. As soon as another key is pressed, CTRL-X mode is exited and
that key is interpreted as in Insert mode.
==============================================================================
2. Special special keys *ins-special-special*
The following keys are special. They stop the current insert, do something,
and then restart insertion. This means you can do something without getting
out of Insert mode. This is very handy if you prefer to use the Insert mode
all the time, just like editors that don't have a separate Normal mode. You
can use CTRL-O if you want to map a function key to a command.
The changes (inserted or deleted characters) before and after these keys can
be undone separately. Only the last change can be redone and always behaves
like an "i" command.
char action ~
-----------------------------------------------------------------------
<Up> cursor one line up *i_<Up>*
<Down> cursor one line down *i_<Down>*
CTRL-G <Up> cursor one line up, insert start column *i_CTRL-G_<Up>*
CTRL-G k cursor one line up, insert start column *i_CTRL-G_k*
CTRL-G CTRL-K cursor one line up, insert start column *i_CTRL-G_CTRL-K*
CTRL-G <Down> cursor one line down, insert start column *i_CTRL-G_<Down>*
CTRL-G j cursor one line down, insert start column *i_CTRL-G_j*
CTRL-G CTRL-J cursor one line down, insert start column *i_CTRL-G_CTRL-J*
<Left> cursor one character left *i_<Left>*
<Right> cursor one character right *i_<Right>*
<S-Left> cursor one word back (like "b" command) *i_<S-Left>*
<C-Left> cursor one word back (like "b" command) *i_<C-Left>*
<S-Right> cursor one word forward (like "w" command) *i_<S-Right>*
<C-Right> cursor one word forward (like "w" command) *i_<C-Right>*
<Home> cursor to first char in the line *i_<Home>*
<End> cursor to after last char in the line *i_<End>*
<C-Home> cursor to first char in the file *i_<C-Home>*
<C-End> cursor to after last char in the file *i_<C-End>*
<LeftMouse> cursor to position of mouse click *i_<LeftMouse>*
<S-Up> move window one page up *i_<S-Up>*
<PageUp> move window one page up *i_<PageUp>*
<S-Down> move window one page down *i_<S-Down>*
<PageDown> move window one page down *i_<PageDown>*
<ScrollWheelDown> move window three lines down *i_<ScrollWheelDown>*
<S-ScrollWheelDown> move window one page down *i_<S-ScrollWheelDown>*
<ScrollWheelUp> move window three lines up *i_<ScrollWheelUp>*
<S-ScrollWheelUp> move window one page up *i_<S-ScrollWheelUp>*
<ScrollWheelLeft> move window six columns left *i_<ScrollWheelLeft>*
<S-ScrollWheelLeft> move window one page left *i_<S-ScrollWheelLeft>*
<ScrollWheelRight>