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# Macros
Macros allow you to send multiple keystrokes when pressing just one key. QMK has a number of ways to define and use macros. These can do anything you want: type common phrases for you, copypasta, repetitive game movements, or even help you code.
!> **Security Note**: While it is possible to use macros to send passwords, credit card numbers, and other sensitive information it is a supremely bad idea to do so. Anyone who gets a hold of your keyboard will be able to access that information by opening a text editor.
## The New Way: `SEND_STRING()` & `process_record_user`
Sometimes you just want a key to type out words or phrases. For the most common situations we've provided `SEND_STRING()`, which will type out your string (i.e. a sequence of characters) for you. All ASCII characters that are easily translated to a keycode are supported (e.g. `\n\t`).
Here is an example `keymap.c` for a two-key keyboard:
```c
enum custom_keycodes {
QMKBEST = SAFE_RANGE,
};
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case QMKBEST:
if (record->event.pressed) {
// when keycode QMKBEST is pressed
SEND_STRING("QMK is the best thing ever!");
} else {
// when keycode QMKBEST is released
}
break;
}
return true;
};
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = {
{QMKBEST, KC_ESC}
}
};
```
What happens here is this:
We first define a new custom keycode in the range not occupied by any other keycodes.
Then we use the `process_record_user` function, which is called whenever a key is pressed or released, to check if our custom keycode has been activated.
If yes, we send the string `"QMK is the best thing ever!"` to the computer via the `SEND_STRING` macro (this is a C preprocessor macro, not to be confused with QMK macros).
We return `true` to indicate to the caller that the key press we just processed should continue to be processed as normal (as we didn't replace or alter the functionality).
Finally, we define the keymap so that the first button activates our macro and the second button is just an escape button.
You might want to add more than one macro.
You can do that by adding another keycode and adding another case to the switch statement, like so:
```c
enum custom_keycodes {
QMKBEST = SAFE_RANGE,
QMKURL,
MY_OTHER_MACRO
};
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case QMKBEST:
if (record->event.pressed) {
// when keycode QMKBEST is pressed
SEND_STRING("QMK is the best thing ever!");
} else {
// when keycode QMKBEST is released
}
break;
case QMKURL:
if (record->event.pressed) {
// when keycode QMKURL is pressed
SEND_STRING("https://qmk.fm/\n");
} else {
// when keycode QMKURL is released
}
break;
case MY_OTHER_MACRO:
if (record->event.pressed) {
SEND_STRING(SS_LCTL("ac")); // selects all and copies
}
break;
}
return true;
};
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = {
{MY_CUSTOM_MACRO, MY_OTHER_MACRO}
}
};
```
### TAP, DOWN and UP
You may want to use keys in your macros that you can't write down, such as `Ctrl` or `Home`.
You can send arbitrary keycodes by wrapping them in:
* `SS_TAP()` presses and releases a key.
* `SS_DOWN()` presses (but does not release) a key.
* `SS_UP()` releases a key.
For example:
SEND_STRING(SS_TAP(X_HOME));
Would tap `KC_HOME` - note how the prefix is now `X_`, and not `KC_`. You can also combine this with other strings, like this:
SEND_STRING("VE"SS_TAP(X_HOME)"LO");
Which would send "VE" followed by a `KC_HOME` tap, and "LO" (spelling "LOVE" if on a newline).
There's also a couple of mod shortcuts you can use:
* `SS_LCTL(string)`
* `SS_LSFT(string)`
* `SS_LALT(string)`
* `SS_LGUI(string)`, `SS_LCMD(string)` or `SS_LWIN(string)`
* `SS_RCTL(string)`
* `SS_RSFT(string)`
* `SS_RALT(string)` or `SS_ALGR(string)`
* `SS_RGUI(string)`, `SS_RCMD(string)` or `SS_RWIN(string)`
These press the respective modifier, send the supplied string and then release the modifier.
They can be used like this:
SEND_STRING(SS_LCTL("a"));
Which would send Left Control+`a` (Left Control down, `a`, Left Control up) - notice that they take strings (eg `"k"`), and not the `X_K` keycodes.
### Alternative Keymaps
By default, it assumes a US keymap with a QWERTY layout; if you want to change that (e.g. if your OS uses software Colemak), include this somewhere in your keymap:
#include <sendstring_colemak.h>
### Strings in Memory
If for some reason you're manipulating strings and need to print out something you just generated (instead of being a literal, constant string), you can use `send_string()`, like this:
```c
char my_str[4] = "ok.";
send_string(my_str);
```
The shortcuts defined above won't work with `send_string()`, but you can separate things out to different lines if needed:
|
