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| Chapter 31 Creating Custom Commands in vi |

## 31.12 Text-Input Mode Cursor Motion with No Arrow Keys

Some people don't like to press ESC first to move the cursor while they're using vi. These keymaps change CTRL-h, CTRL-j, CTRL-k, and CTRL-l to do the same things during input mode as the commands `h`, `j`, `k`, and `l` do in command mode.

> NOTE: Is your erase character set to CTRL-h (5.9) outside vi? If it is, mapping CTRL-h (usually labeled BACKSPACE on your keyboard) will change the way CTRL-h works during text-input mode: Instead of erasing the characters you've typed since you entered text-input mode, now CTRL-h will move backwards over what you type without erasing it. One workaround is to change your UNIX erase character to the DELETE or RUBOUT key by typing the command `stty erase '?'` before you start vi. Then your DELETE key will erase what you type and the BACKSPACE key will jump back over it without deleting.

exrc | The lines for your .exrc file (4.9) are below:

>     map! H [i
>     map! K [ka
>     map! L [la
>     map! V
>      [ja
>     " Note: the two lines above map J (LINEFEED)

That last map takes two lines; it's tricky and may not work right on all versions of vi. No, it isn't a map for CTRL-v, though that's what it looks like. It maps `J`, the LINEFEED key. The `V` comes at the very end of its line. When you're entering that keymap, type CTRL-v and then press LINEFEED or CTRL-j. The cursor will move to the start of the next line; type a SPACE and the rest of the macro. It's a good idea to add the reminder comment (starting with the comment character, a double quote (`"`)), on the line below the map.

> NOTE: This map for CTRL-j is pretty obviously something that the people who wrote my version of vi didn't plan for. For example, look at the mess it makes when I ask for a list of my text-input keymaps:

> >     :map!
> >     H      H      [i
> >     K      K      [ka
> >     L      L      [la

> >             [ja

> Before you use this map on important files, you should probably test it carefully.

- JP

31.11 Typing in Uppercase Without CAPS LOCK |  | 31.13 Making Cursor Keys Work in vi Text-input Mode