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# Command
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Command, formerly known as Magic, is a way to change your keyboard's behavior without having to flash or unplug it to use [Bootmagic ](bootmagic ). There is a lot of overlap between this functionality and the [Magic Keycodes ](../keycodes_magic ). Wherever possible we encourage you to use that feature instead of Command.
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On some keyboards Command is disabled by default. If this is the case, it must be explicitly enabled in your `rules.mk` :
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```make
COMMAND_ENABLE = yes
```
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## Usage
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To use Command, hold down the key combination defined by the `IS_COMMAND()` macro. By default this is Left Shift+Right Shift. Then, press the key corresponding to the command you want. For example, to output the current QMK version to the QMK Toolbox console, press Left Shift+Right Shift+`V`.
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## Configuration
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If you would like to change the key assignments for Command, `#define` these in your `config.h` at either the keyboard or keymap level. All keycode assignments here must omit the `KC_` prefix.
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|Define |Default |Description |
|------------------------------------|--------------------------------|------------------------------------------------|
|`IS_COMMAND()` |`(get_mods() == MOD_MASK_SHIFT)`|The key combination to activate Command |
|`MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS` |`true` |Set default layer with the Function row |
|`MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS` |`true` |Set default layer with the number keys |
|`MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM`|`false` |Set default layer with `MAGIC_KEY_LAYER0..9` |
|`MAGIC_KEY_DEBUG` |`D` |Toggle debugging over serial |
|`MAGIC_KEY_DEBUG_MATRIX` |`X` |Toggle key matrix debugging |
|`MAGIC_KEY_DEBUG_KBD` |`K` |Toggle keyboard debugging |
|`MAGIC_KEY_DEBUG_MOUSE` |`M` |Toggle mouse debugging |
|`MAGIC_KEY_CONSOLE` |`C` |Enable the Command console |
|`MAGIC_KEY_VERSION` |`V` |Print the running QMK version to the console |
|`MAGIC_KEY_STATUS` |`S` |Print the current keyboard status to the console|
|`MAGIC_KEY_HELP` |`H` |Print Command help to the console |
|`MAGIC_KEY_HELP_ALT` |`SLASH` |Print Command help to the console (alternate) |
|`MAGIC_KEY_LAYER0` |`0` |Make layer 0 the default layer |
|`MAGIC_KEY_LAYER0_ALT` |`GRAVE` |Make layer 0 the default layer (alternate) |
|`MAGIC_KEY_LAYER1` |`1` |Make layer 1 the default layer |
|`MAGIC_KEY_LAYER2` |`2` |Make layer 2 the default layer |
|`MAGIC_KEY_LAYER3` |`3` |Make layer 3 the default layer |
|`MAGIC_KEY_LAYER4` |`4` |Make layer 4 the default layer |
|`MAGIC_KEY_LAYER5` |`5` |Make layer 5 the default layer |
|`MAGIC_KEY_LAYER6` |`6` |Make layer 6 the default layer |
|`MAGIC_KEY_LAYER7` |`7` |Make layer 7 the default layer |
|`MAGIC_KEY_LAYER8` |`8` |Make layer 8 the default layer |
|`MAGIC_KEY_LAYER9` |`9` |Make layer 9 the default layer |
|`MAGIC_KEY_BOOTLOADER` |`B` |Jump to bootloader |
|`MAGIC_KEY_BOOTLOADER_ALT` |`ESC` |Jump to bootloader (alternate) |
|`MAGIC_KEY_LOCK` |`CAPS` |Lock the keyboard so nothing can be typed |
|`MAGIC_KEY_EEPROM` |`E` |Print stored EEPROM config to the console |
|`MAGIC_KEY_EEPROM_CLEAR` |`BSPACE` |Clear the EEPROM |
|`MAGIC_KEY_NKRO` |`N` |Toggle N-Key Rollover (NKRO) |
|`MAGIC_KEY_SLEEP_LED` |`Z` |Toggle LED when computer is sleeping |