## [Switching and Toggling Layers](feature_advanced_keycodes.md#switching-and-toggling-layers)
-|Key |Description |
-|---------------|----------------------------------------------------------------------------------|
-|`LT(layer, kc)`|Turn on `layer` when held, `kc` when tapped |
-|`TO(layer)` |Turn on `layer` when pressed |
-|`MO(layer)` |Momentarily turn on `layer` when pressed (requires `KC_TRNS` on destination layer)|
-|`DF(layer)` |Set the base (default) layer |
-|`TG(layer)` |Toggle `layer` on or off |
-|`TT(layer)` |Tap toggle? idk FIXME |
+|Key |Description |
+|----------------|----------------------------------------------------------------------------------|
+|`LT(layer, kc)` |Turn on `layer` when held, `kc` when tapped |
+|`TO(layer)` |Turn on `layer` when pressed |
+|`MO(layer)` |Momentarily turn on `layer` when pressed (requires `KC_TRNS` on destination layer)|
+|`DF(layer)` |Set the base (default) layer |
+|`TG(layer)` |Toggle `layer` on or off |
+|`TT(layer)` |Normally acts like MO unless it's tapped multiple times, which toggles `layer` on |
+|`LM(layer, mod)`|Momentarily turn on `layer` (like MO) with `mod` active as well. |
## [One Shot Keys](quantum_keycodes.md#one-shot-keys)