static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    /* Keymap 0: qwerty */
    KEYMAP_ANSI(
        GRV, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSPC, \
        TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   LBRC,RBRC,BSLS, \
        CAPS,A,   S,   D,   F,   G,   H,   J,   K,   L,   SCLN,QUOT,     ENT,  \
        LSFT,Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,          RSFT, \
        LCTL,LGUI,LALT,          SPC,                     FN0, RGUI,APP, RCTL),
    /* Keymap 1: colemak */
    KEYMAP_ANSI(
        GRV, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSPC, \
        TAB, Q,   W,   F,   P,   G,   J,   L,   U,   Y,   SCLN,LBRC,RBRC,BSLS, \
        BSPC,A,   R,   S,   T,   D,   H,   N,   E,   I,   O,   QUOT,     ENT,  \
        LSFT,Z,   X,   C,   V,   B,   K,   M,   COMM,DOT, SLSH,          RSFT, \
        LCTL,LGUI,LALT,          SPC,                     FN0, RGUI,APP, RCTL),
    /* Keymap 2: dvorak */
    KEYMAP_ANSI(
        GRV, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   LBRC,RBRC,BSPC, \
        TAB, QUOT,COMM,DOT, P,   Y,   F,   G,   C,   R,   L,   SLSH,EQL, BSLS, \
        CAPS,A,   O,   E,   U,   I,   D,   H,   T,   N,   S,   MINS,     ENT,  \
        LSFT,SCLN,Q,   J,   K,   X,   B,   M,   W,   V,   Z,             RSFT, \
        LCTL,LGUI,LALT,          SPC,                     FN0, RGUI,APP, RCTL),
    /* Keymap: workman */
    KEYMAP_ANSI(
        GRV, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSPC, \
        TAB, Q,   D,   R,   W,   B,   J,   F,   U,   P,   SCLN,LBRC,RBRC,BSLS, \
        BSPC,A,   S,   H,   T,   G,   Y,   N,   E,   O,   I,   QUOT,     ENT,  \
        LSFT,Z,   X,   M,   C,   V,   K,   L,   COMM,DOT, SLSH,          RSFT, \
        LCTL,LGUI,LALT,          SPC,                     FN0, RGUI,APP, RCTL),
};
static const uint8_t PROGMEM overlays[][MATRIX_ROWS][MATRIX_COLS] = {
    /* Overlay 0: Poker with Arrow */
    KEYMAP_ANSI(
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,     TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,          UP,   \
        TRNS,TRNS,TRNS,          TRNS,                    TRNS,LEFT,DOWN,RGHT),
    /* Overlay 1: Poker with Esc */
    KEYMAP_ANSI(
        ESC, TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,     TRNS, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,          TRNS, \
        TRNS,TRNS,TRNS,          TRNS,                    TRNS,TRNS,TRNS,TRNS),
    /* Overlay 2: Poker Fn
     * ,-----------------------------------------------------------.
     * |Esc| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|       |
     * |-----------------------------------------------------------|
     * |     |FnQ| Up|   |   |   |   |   |   |Cal|   |Hom|Ins|FnL  |
     * |-----------------------------------------------------------|
     * |      |Lef|Dow|Rig|   |   |Psc|Slk|Pau|   |Tsk|End|        |
     * |-----------------------------------------------------------|
     * |        |Del|   |Web|Mut|VoU|VoD|   |PgU|PgD|Del|          |
     * |-----------------------------------------------------------|
     * |    |    |    |         FnS            |    |    |    |    |
     * `-----------------------------------------------------------'
     * Fn:  to Fn overlay
     * FnL: to Layout selector overaly
     * FnQ: toggle Esc overlay
     * FnS: toggle Arrow overlay
     */
    KEYMAP_ANSI(
        ESC, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, TRNS, \
        TRNS,FN2, UP,  TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,CALC,TRNS,HOME,INS, FN4,  \
        TRNS,LEFT,DOWN,RGHT,TRNS,TRNS,PSCR,SLCK,PAUS,TRNS,FN3, END,      TRNS, \
        TRNS,DEL, TRNS,WHOM,MUTE,VOLU,VOLD,TRNS,PGUP,PGDN,DEL,           TRNS, \
        TRNS,TRNS,TRNS,          FN1,                     TRNS,TRNS,TRNS,TRNS),
    /* Overlay 3: Layout selector
     * ,-----------------------------------------------------------.
     * | Lq| Lc| Ld| Lw|   |   |   |   |   |   |   |   |   |       |
     * |-----------------------------------------------------------|
     * |     |Lq |Lw |   |   |   |   |   |   |   |   |   |   |     |
     * |-----------------------------------------------------------|
     * |      |   |   |Ld |   |   |   |   |   |   |   |   |        |
     * |-----------------------------------------------------------|
     * |        |   |   |Lc |   |   |   |   |   |   |   |          |
     * |-----------------------------------------------------------|
     * |    |    |    |                        |    |    |    |    |
     * `-----------------------------------------------------------'
     * Lq: set Qwerty layout
     * Lc: set Colemak layout
     * Ld: set Dvorak layout
     * Lw: set Workman layout
     */
    KEYMAP_ANSI(
        FN5, FN6, FN7, FN8, TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
        TRNS,FN5, FN8, TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
        TRNS,TRNS,TRNS,FN7, TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,     TRNS, \
        TRNS,TRNS,TRNS,FN6, TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,          TRNS, \
        TRNS,TRNS,TRNS,          TRNS,                    TRNS,TRNS,TRNS,TRNS),
};
static const uint16_t PROGMEM fn_actions[] = {
    /* Poker Layout */
    [0] = ACTION_OVERLAY(2),            // to Fn overlay
    [1] = ACTION_OVERLAY_TOGGLE(0),     // toggle arrow overlay
    [2] = ACTION_OVERLAY_TOGGLE(1),     // toggle Esc overlay
    [3] = ACTION_RMODS_KEY(MOD_BIT(KC_RCTL)|MOD_BIT(KC_RSFT), KC_ESC), // Task(RControl,RShift+Esc)
    [4] = ACTION_OVERLAY(3),            // to Layout selector
    [5] = ACTION_SET_DEFAULT_LAYER(0),  // set qwerty layout
    [6] = ACTION_SET_DEFAULT_LAYER(1),  // set colemak layout
    [7] = ACTION_SET_DEFAULT_LAYER(2),  // set dvorak layout
    [8] = ACTION_SET_DEFAULT_LAYER(3),  // set workman layout
};