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diff --git a/docs/config_options.md b/docs/config_options.md
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@@ -123,6 +123,15 @@ If you define these options you will enable the associated feature, which may in
* how many taps before oneshot toggle is triggered
* `#define IGNORE_MOD_TAP_INTERRUPT`
* makes it possible to do rolling combos (zx) with keys that convert to other keys on hold
+* `#define QMK_KEYS_PER_SCAN 4`
+ * Allows sending more than one key per scan. By default, only one key event gets
+ sent via `process_record()` per scan. This has little impact on most typing, but
+ if you're doing a lot of chords, or your scan rate is slow to begin with, you can
+ have some delay in processing key events. Each press and release is a separate
+ event. For a keyboard with 1ms or so scan times, even a very fast typist isn't
+ going to produce the 500 keystrokes a second needed to actually get more than a
+ few ms of delay from this. But if you're doing chording on something with 3-4ms
+ scan times? You probably want this.
### RGB Light Configuration