[Keymap] Niu keymap and README update (#9190)

* - Balance 12 layers now in their final form
- Added Plover layer
- Updated README to use layout images

* Add headings to layer images.

* - Remove redundent TO(_BA) from FC layer
- Link to new FC layer image from README

* Highlight home keys.

* Changes following review.

keyboards/niu_mini/keymaps/yttyx/README.md

@@ -1,7 +1,7 @@
 # Overview
 
-This layout is based on Balance Twelve (mirror variant) by Sasha Viminitz. Please see [this page](https://mathematicalmulticore.wordpress.com/the-keyboard-layout-project/) 
-for more information. It's designed for left-handers who use their right hand for the mouse.
+This layout uses a mirror variant of Balance 12, created by Sasha Viminitz. See [this page](https://mathematicalmulticore.wordpress.com/the-keyboard-layout-project/) 
+for more information.
 
 ## To build
 
@@ -19,74 +19,14 @@ sudo dfu-programmer atmega32u4 launch
 
 ## Layers
 
-### Base:
+### Balance 12 base (BA) layer
+![Base layer](https://i.imgur.com/I0TkIHT.png)
 
-    .--------.-------.-------.-------.--------.                           .-------.-------.-------.-------.------.
-    | P      | L     | C     | D     | W      |                           | U     | O     | Y     | K     | Q    |
-    |--------+-------+-------+-------+--------|                           |-------+-------+-------+-------+------|
-    | N      | R     | S     | T     | M      |                           | A     | E     | I     | H     | V    |
-    |--------+-------+-------+-------+--------|                           |-------+-------+-------+-------+------|
-    | Z Sft  | J Ctl | F Alt | G     | B      |                           | ,     | . Alt | ; Ctl | X Sft | Sup  |
-    '--------'-------'-------+-------+--------+-----.               .-----+-------+-------+-------'-------'------'
-                             | BS P1 | Spc P2 | P3  |               |     | Sft   |       |
-                             '-------'--------'-----'               '-----'-------'-------'
+### Numeric/Punctuation (NP) layer
+![Numeric/Punctuation layer](https://i.imgur.com/GgZ0PCq.png)
 
-### P1: Punctuation (1)
+### Function/Cursor (FC) layer
+![Function/Cursor layer](https://i.imgur.com/zcVID2d.png)
 
-    .--------.-------.-------.-------.-------.                              .------.-------.-------.-------.------.
-    | Esc    |       |       |       |       |                              | |    | /     | ^     | £     |  ~   |
-    |--------+-------+-------+-------+-------|                              |------+-------+-------+-------+------|
-    | Tab    |       |       |       |       |                              | &    | \     | `     | $     | Ent  |
-    |--------+-------+-------+-------+-------|                              |------+-------+-------+-------+------|
-    | Sft    | Ctl   | Alt   | Del   |       |                              | %    | Alt   | Ctl   | Sft   | Sup  |
-    '--------'-------'-------+-------+-------+-----.                  .-----+------+-------+-------'-------'------'
-                             | P1    |       |     |                  |     | Sft  |       |
-                             '-------'-------'-----'                  '-----'------'-------'
-
-### P2: Punctuation (2)
-
-    .-------.-------.-------.-------.-------.                               .-------.-------.-------.-------.------.
-    | Esc   |       | NC    | FV    |       |                               | (     | )     | "     | ?     |      |
-    |-------+-------+-------+-------+-------|                               |-------+-------+-------+-------+------|
-    | Tab   | Ctl-X | Ctl-C | Ctl-V | Ctl-Z |                               | {     | }     | '     | !     | Ent  |
-    |-------+-------+-------+-------+-------|                               |-------+-------+-------+-------+------|
-    | Sft   | Ctl   | Alt   | Del   | Ent   |                               | #     | Alt   | Ctl   | Sft   | Sup  |
-    '-------'-------'-------+-------+-------+-----.                   .-----+-------+-------+-------'-------'------'
-                            | BS    | P2    |     |                   |     | Sft   |       |
-                            '-------'-------'-----'                   '-----'-------'-------'
-
-### P3: Punctuation (3)
-
-    .-------.-------.-------.-------.-------.                             .------.-------.-------.-------.------.
-    | Esc   |       | Break | Pscr  | ScLk  |                             | <    | >     | +     | _     | =    |
-    |-------+-------+-------+-------+-------|                             |------+-------+-------+-------+------|
-    | Tab   |       |       | Caps  |       |                             | [    | ]     | *     | -     | Ent  |
-    |-------+-------+-------+-------+-------|                             |------+-------+-------+-------+------|
-    | Sft   | Ctl   | Alt   | Del   |       |                             | @    | Alt   | Ctl   | Sft   | Sup  |
-    '-------'-------'-------+-------+-------+-----.                 .-----+------+-------+-------'-------'------'
-                            | BS    |       | P3  |                 |     | Sft  |       |
-                            '-------'-------'-----'                 '-----'------'-------'
-
-### Numerals / Cursor control
-
-    .-------.-------.-------.------.-------.                              .------.-------.-------.------.------.
-    | 1     | 2     | 3     | 4    | 5     |                              | Home | Up    | End   | PgUp |      |
-    |-------+-------+-------+------+-------|                              |------+-------+-------+------+------|
-    | 6     | 7     | 8     | 9    | 0     |                              | Left | Down  | Right | PgDn |      |
-    |-------+-------+-------+------+-------|                              |------+-------+-------+------+------|
-    | Sft   | Ctl   | Alt   | Del  | .     |                              | Ins  | Alt   | Ctl   | Sft  | Sup  |
-    '-------'-------'-------+------+-------+-----.                  .-----+------+-------+-------'------'------'
-                            | BS   | BA    |     |                  |     | Sft  |       |
-                            '------'-------'-----'                  '-----'------'-------'
-
-### FV: Function keys / Cursor control (Vim)
-
-    .-------.------.-------.-----.-------.                                .------.-------.-----.-------.------.
-    | F1    | F2   | F3    | F4  | F5    |                                | 0    | K     | $   | Ctl-B |      |
-    |-------+------+-------+-----+-------|                                |------+-------+-----+-------+------|
-    | F6    | F7   | F8    | F9  | F10   |                                | H    | J     | L   | Ctl-F |      |
-    |-------+------+-------+-----+-------|                                |------+-------+-----+-------+------|
-    | Sft   | Ctl  | Alt   | F11 | F12   |                                |      | Alt   | Ctl | Sft   | Sup  |
-    '-------'------'-------+-----+-------+-----.                    .-----+------+-------+-----'-------'------'
-                           | BS  | BA    |     |                    |     | Sft  |       |
-                           '-----'-------'-----'                    '-----'------'-------'
+### Plover (PL) layer
+![Plover layer](https://i.imgur.com/RikOGXe.png)

keyboards/niu_mini/keymaps/yttyx/keymap.c

@@ -1,141 +1,95 @@
 
 #include QMK_KEYBOARD_H
+#include "keymap_steno.h"
 
 enum layers {
-  BA,           // Base (Balance Twelve mirror variant)
-  P1,           // Punctuation (1)
-  P2,           // Punctuation (2)
-  P3,           // Punctuation (2)
-  NC,           // Numerals / Cursor control
-  FV            // Function keys / Cursor control (Vim)
+  _BA,           // Base (Balance Twelve mirror variant)
+  _NP,           // Numeric/Punctuation
+  _FC,           // Function
+  _PL            // Plover
 };
 
-// Abbreviations - base
-#define KX_P1_BSPC      LT(P1, KC_BSPC)
-#define KX_P2_SPC       LT(P2, KC_SPC)
-
-#define KX_SFT_Z        MT(MOD_LSFT, KC_Z)
-#define KX_CTL_J        MT(MOD_LCTL, KC_J)
-#define KX_ALT_F        MT(MOD_LALT, KC_F)
-
-#define KX_ALT_DOT      MT(MOD_LALT, KC_DOT)
-#define KX_CTL_SCLN     MT(MOD_LCTL, KC_SCLN)
-#define KX_SFT_X        MT(MOD_LSFT, KC_X)
-
-#define KX_AT           LSFT(KC_QUOT)
-#define KX_DQUOT        LSFT(KC_2)
-#define KX_PIPE         LSFT(KC_NUBS)
-#define KX_TILDA        LSFT(KC_NUHS)
-
+// Abbreviations
+#define KX_SFT_Z   MT(MOD_LSFT, KC_Z)
+#define KX_SFT_X   MT(MOD_LSFT, KC_X)
+#define LT_ESC_FC  LT(_FC, KC_ESC)
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-  /*
-    .--------.-------.-------.-------.--------.                           .-------.-------.-------.-------.------.
-    | P      | L     | C     | D     | W      |                           | U     | O     | Y     | K     | Q    |
-    |--------+-------+-------+-------+--------|                           |-------+-------+-------+-------+------|
-    | N      | R     | S     | T     | M      |                           | A     | E     | I     | H     | V    |
-    |--------+-------+-------+-------+--------|                           |-------+-------+-------+-------+------|
-    | Z Sft  | J Ctl | F Alt | G     | B      |                           | ,     | . Alt | ; Ctl | X Sft | Sup  |
-    '--------'-------'-------+-------+--------+-----.               .-----+-------+-------+-------'-------'------'
-                             | BS P1 | Spc P2 | P3  |               |     | Sft   |       |
-                             '-------'--------'-----'               '-----'-------'-------'
-  */                                                               
-  [BA] = LAYOUT(                                                   
-    KC_P,     KC_L,     KC_C,     KC_D,       KC_W,      XXXXXXX,   XXXXXXX, KC_U,    KC_O,       KC_Y,        KC_K,     KC_Q,
-    KC_N,     KC_R,     KC_S,     KC_T,       KC_M,      XXXXXXX,   XXXXXXX, KC_A,    KC_E,       KC_I,        KC_H,     KC_V,
-    KX_SFT_Z, KX_CTL_J, KX_ALT_F, KC_G,       KC_B,      XXXXXXX,   XXXXXXX, KC_COMM, KX_ALT_DOT, KX_CTL_SCLN, KX_SFT_X, KC_LGUI,
-    XXXXXXX,  XXXXXXX,  XXXXXXX,  KX_P1_BSPC, KX_P2_SPC, MO(P3),    XXXXXXX, KC_RSFT, XXXXXXX,    XXXXXXX,     XXXXXXX,  XXXXXXX
-  ),
 
-  /* P1: Punctuation (1)
-    .--------.-------.-------.-------.-------.                              .------.-------.-------.-------.------.
-    | Esc    |       |       |       |       |                              | |    | /     | ^     | £     |  ~   |
-    |--------+-------+-------+-------+-------|                              |------+-------+-------+-------+------|
-    | Tab    |       |       |       |       |                              | &    | \     | `     | $     | Ent  |
-    |--------+-------+-------+-------+-------|                              |------+-------+-------+-------+------|
-    | Sft    | Ctl   | Alt   | Del   |       |                              | %    | Alt   | Ctl   | Sft   | Sup  |
-    '--------'-------'-------+-------+-------+-----.                  .-----+------+-------+-------'-------'------'
-                             | P1    |       |     |                  |     | Sft  |       |
-                             '-------'-------'-----'                  '-----'------'-------'
+  /* Base
+     .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+     | P      | L      | C      | D      | W      |        |        | U      | O      | Y      | K      | Q      |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | N      | R      | S      | T      | M      |        | BS     | A      | E      | I      | H      | V      |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | Z Sft  | J      | F      | G      | B      |        | Ent    | ' @    | , <    | . >    | X Sft  |        |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | Ctl    | Alt    | Sup    | NP     | Spc    | Esc FC | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+     '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
   */
-  [P1] = LAYOUT(       
-    KC_ESC,  XXXXXXX,    XXXXXXX,    XXXXXXX,    XXXXXXX,    XXXXXXX, XXXXXXX, KX_PIPE, KC_SLSH, KC_CIRC, KC_HASH, KX_TILDA,  
-    KC_TAB,  XXXXXXX,    XXXXXXX,    XXXXXXX,    XXXXXXX,    XXXXXXX, XXXXXXX, KC_AMPR, KC_NUBS, KC_GRV,  KC_DLR,  KC_ENT,
-    KC_LSFT, KC_LCTL,    KC_LALT,    KC_DEL,     XXXXXXX,    XXXXXXX, XXXXXXX, KC_PERC, KC_LALT, KC_LCTL, KC_LSFT, _______,
-    XXXXXXX, XXXXXXX,    XXXXXXX,    _______,    XXXXXXX,    XXXXXXX, XXXXXXX, _______, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX
+  [_BA] = LAYOUT(                                                   
+    KC_P,     KC_L,    KC_C,    KC_D,    KC_W,   XXXXXXX,   XXXXXXX, KC_U,    KC_O,    KC_Y,    KC_K,     KC_Q,
+    KC_N,     KC_R,    KC_S,    KC_T,    KC_M,   XXXXXXX,   KC_BSPC, KC_A,    KC_E,    KC_I,    KC_H,     KC_V,
+    KX_SFT_Z, KC_J,    KC_F,    KC_G,    KC_B,   XXXXXXX,   KC_ENT,  KC_QUOT, KC_COMM, KC_DOT,  KX_SFT_X, XXXXXXX,
+    KC_LCTL,  KC_LALT, KC_LGUI, MO(_NP), KC_SPC, LT_ESC_FC, KC_LSFT, KC_LSFT, KC_LGUI, KC_LALT, KC_LCTL,  XXXXXXX
   ),
 
-  /* P2: Punctuation (2)
-    .-------.-------.-------.-------.-------.                               .-------.-------.-------.-------.------.
-    | Esc   |       | NC    | FV    |       |                               | (     | )     | "     | ?     |      |
-    |-------+-------+-------+-------+-------|                               |-------+-------+-------+-------+------|
-    | Tab   | Ctl-X | Ctl-C | Ctl-V | Ctl-Z |                               | {     | }     | '     | !     | Ent  |
-    |-------+-------+-------+-------+-------|                               |-------+-------+-------+-------+------|
-    | Sft   | Ctl   | Alt   | Del   | Ent   |                               | #     | Alt   | Ctl   | Sft   | Sup  |
-    '-------'-------'-------+-------+-------+-----.                   .-----+-------+-------+-------'-------'------'
-                            | BS    | P2    |     |                   |     | Sft   |       |
-                            '-------'-------'-----'                   '-----'-------'-------'
-  */
-  [P2] = LAYOUT(
-    KC_ESC,  XXXXXXX,    TO(NC),     TO(FV),     XXXXXXX,    XXXXXXX, XXXXXXX, KC_LPRN, KC_RPRN, KX_DQUOT, KC_QUES, XXXXXXX,
-    KC_TAB,  LCTL(KC_X), LCTL(KC_C), LCTL(KC_V), LCTL(KC_Z), XXXXXXX, XXXXXXX, KC_LCBR, KC_RCBR, KC_QUOT,  KC_EXLM, KC_ENT,
-    KC_LSFT, KC_LCTL,    KC_LALT,    KC_DEL,     KC_ENT,     XXXXXXX, XXXXXXX, KC_NUHS, KC_LALT, KC_LCTL,  KC_LSFT, _______,
-    XXXXXXX, XXXXXXX,    XXXXXXX,    KC_BSPC,    _______,    XXXXXXX, XXXXXXX, _______, XXXXXXX, XXXXXXX,  XXXXXXX, XXXXXXX
-  ),
-
-  /* P3: Punctuation (3)
-    .-------.-------.-------.-------.-------.                             .------.-------.-------.-------.------.
-    | Esc   |       | Break | Pscr  | ScLk  |                             | <    | >     | +     | _     | =    |
-    |-------+-------+-------+-------+-------|                             |------+-------+-------+-------+------|
-    | Tab   |       |       | Caps  |       |                             | [    | ]     | *     | -     | Ent  |
-    |-------+-------+-------+-------+-------|                             |------+-------+-------+-------+------|
-    | Sft   | Ctl   | Alt   | Del   |       |                             | @    | Alt   | Ctl   | Sft   | Sup  |
-    '-------'-------'-------+-------+-------+-----.                 .-----+------+-------+-------'-------'------'
-                            | BS    |       | P3  |                 |     | Sft  |       |
-                            '-------'-------'-----'                 '-----'------'-------'
-  */
-  [P3] = LAYOUT(
-    KC_ESC,  XXXXXXX, KC_BRK,  KC_PSCR, KC_SLCK, XXXXXXX,           XXXXXXX, KC_LABK, KC_RABK, KC_PLUS, KC_UNDS, KC_EQL,
-    KC_TAB,  XXXXXXX, XXXXXXX, KC_CAPS, XXXXXXX, XXXXXXX,           XXXXXXX, KC_LBRC, KC_RBRC, KC_ASTR, KC_MINS, KC_ENT,
-    KC_LSFT, KC_LCTL, KC_LALT, KC_DEL,  XXXXXXX, XXXXXXX,           XXXXXXX, KX_AT,   KC_LALT, KC_LCTL, KC_LSFT, _______,
-    XXXXXXX, XXXXXXX, XXXXXXX, KC_BSPC, XXXXXXX, _______,           XXXXXXX, _______, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX
+  /* Numeric/Punctuation (NP)
+     .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+     | 1 !    | 2 "    | 3 £    | 4 $    | 5 %    | PL     |        | 6 ^    | 7 &    | 8 *    | 9 (    | 0 )    |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | Tab    | Ctl-X  | Ctl-C  | Ctl-V  | Ctl-Z  |        |        | [ {    | ] }    | - _    | ; :    | \ |    |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | Sft    |        |        | Del    | Ins    |        |        | / ?    | = +    | # ~    | `      |        |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | Ctl    | Alt    | Sup    | NP     | Spc    |        | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+     '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
+  */                                           
+  [_NP] = LAYOUT(
+    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    TO(_PL), XXXXXXX, KC_6,    KC_7,    KC_8,    KC_9,    KC_0,
+    KC_TAB,  C(KC_X), C(KC_C), C(KC_V), C(KC_Z), XXXXXXX, _______, KC_LBRC, KC_RBRC, KC_MINS, KC_SCLN, KC_NUBS,
+    KC_LSFT, XXXXXXX, XXXXXXX, KC_DEL,  KC_INS,  XXXXXXX, XXXXXXX, KC_SLSH, KC_EQL,  KC_NUHS, KC_GRV,  XXXXXXX, 
+    _______, _______, _______, _______, _______, XXXXXXX, _______, _______, _______, _______, _______, XXXXXXX
   ),
 
-  /* NC: Numerals / Cursor control
-    .-------.-------.-------.------.-------.                              .------.-------.-------.------.------.
-    | 1     | 2     | 3     | 4    | 5     |                              | Home | Up    | End   | PgUp |      |
-    |-------+-------+-------+------+-------|                              |------+-------+-------+------+------|
-    | 6     | 7     | 8     | 9    | 0     |                              | Left | Down  | Right | PgDn |      |
-    |-------+-------+-------+------+-------|                              |------+-------+-------+------+------|
-    | Sft   | Ctl   | Alt   | Del  | .     |                              | Ins  | Alt   | Ctl   | Sft  | Sup  |
-    '-------'-------'-------+------+-------+-----.                  .-----+------+-------+-------'------'------'
-                            | BS   | BA    |     |                  |     | Sft  |       |
-                            '------'-------'-----'                  '-----'------'-------'
+  /* Function/Cursor (FC)
+     .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+     | F1     | F2     | F3     | F4     | F5     |        |        | Home   | Up     | End    | PgUp   |        |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | F6     | F7     | F8     | F9     | F10    |        |        | Left   | Down   | Right  | PgDn   |        |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | Sft    |        |        | F11    | F12    |        |        | PScr   | Break  | ScLk   | Caps   |        |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | Ctl    | Alt    | Sup    |        | Spc    |        | Sft    | Sft    | Sup    | Alt    | Ctl    |        |
+     '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
   */
-  [NC] = LAYOUT(
-    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,   XXXXXXX,            XXXXXXX, KC_HOME, KC_UP,   KC_END,  KC_PGUP, XXXXXXX,
-    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,   XXXXXXX,            XXXXXXX, KC_LEFT, KC_DOWN, KC_RGHT, KC_PGDN, XXXXXXX,
-    KC_LSFT, KC_LCTL, KC_LALT, KC_DEL,  KC_DOT, XXXXXXX,            XXXXXXX, KC_INS,  KC_LALT, KC_LCTL, KC_LSFT, _______,
-    XXXXXXX, XXXXXXX, XXXXXXX, KC_BSPC, TO(BA), XXXXXXX,            XXXXXXX, _______, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX
+  [_FC] = LAYOUT(
+    KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   XXXXXXX, XXXXXXX, KC_HOME, KC_UP,   KC_END,  KC_PGUP, XXXXXXX,
+    KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  XXXXXXX, XXXXXXX, KC_LEFT, KC_DOWN, KC_RGHT, KC_PGDN, XXXXXXX,
+    _______, XXXXXXX, XXXXXXX, KC_F11,  KC_F12,  XXXXXXX, XXXXXXX, KC_PSCR, KC_BRK,  KC_SLCK, KC_CAPS, XXXXXXX,
+    _______, _______, _______, XXXXXXX, _______, _______, _______, _______, _______, _______, _______, XXXXXXX
   ),
 
-  /* FV: Function keys / Cursor control (Vim)
-    .-------.------.-------.-----.-------.                                .------.-------.-----.-------.------.
-    | F1    | F2   | F3    | F4  | F5    |                                | 0    | K     | $   | Ctl-B |      |
-    |-------+------+-------+-----+-------|                                |------+-------+-----+-------+------|
-    | F6    | F7   | F8    | F9  | F10   |                                | H    | J     | L   | Ctl-F |      |
-    |-------+------+-------+-----+-------|                                |------+-------+-----+-------+------|
-    | Sft   | Ctl  | Alt   | F11 | F12   |                                |      | Alt   | Ctl | Sft   | Sup  |
-    '-------'------'-------+-----+-------+-----.                    .-----+------+-------+-----'-------'------'
-                           | BS  | BA    |     |                    |     | Sft  |       |
-                           '-----'-------'-----'                    '-----'------'-------'
+  /* Plover (PL)
+     .--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.--------.
+     | #      | #      | #      | #      | #      | BA     | #      | #      | #      | #      | #      | #      |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | S      | T      | P      | H      | *      |        | *      | F      | P      | L      | T      | D      |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     | S      | K      | W      | R      | *      |        | *      | R      | B      | G      | S      | Z      |
+     |--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------|
+     |        |        |        | A      | O      |        | E      | U      |        |        |        |        |
+     '--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'--------'
   */
-  [FV] = LAYOUT(
-    KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,  XXXXXXX,            XXXXXXX, KC_0,    KC_K,    KC_DLR,   LCTL(KC_B), XXXXXXX,
-    KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10, XXXXXXX,            XXXXXXX, KC_H,    KC_J,    KC_L,     LCTL(KC_F), XXXXXXX,
-    KC_LSFT, KC_LCTL, KC_LALT, KC_F11,  KC_F12, XXXXXXX,            XXXXXXX, XXXXXXX, KC_LALT, KC_LCTL,  KC_LSFT,    _______,
-    XXXXXXX, XXXXXXX, XXXXXXX, KC_BSPC, TO(BA), XXXXXXX,            XXXXXXX, _______, XXXXXXX, XXXXXXX,  XXXXXXX,    XXXXXXX
+  [_PL] = LAYOUT(
+    STN_NUM, STN_NUM, STN_NUM, STN_NUM, STN_NUM, TO(_BA), STN_NUM, STN_NUM, STN_NUM, STN_NUM, STN_NUM, STN_NUM,
+    STN_S1,  STN_TL,  STN_PL,  STN_HL,  STN_ST1, XXXXXXX, STN_ST1, STN_FR,  STN_PR,  STN_LR,  STN_TR,  STN_DR,
+    STN_S2,  STN_KL,  STN_WL,  STN_RL,  STN_ST2, XXXXXXX, STN_ST2, STN_RR,  STN_BR,  STN_GR,  STN_SR,  STN_ZR,
+    XXXXXXX, XXXXXXX, XXXXXXX, STN_A,   STN_O,   XXXXXXX, STN_E,   STN_U,   XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX
   )
 
 };
 
+void matrix_init_user() {
+  steno_set_mode(STENO_MODE_GEMINI);
+}

keyboards/niu_mini/keymaps/yttyx/rules.mk

@@ -6,5 +6,5 @@ MIDI_ENABLE = no
 MOUSEKEY_ENABLE = no
 NKRO_ENABLE = yes
 RGBLIGHT_ENABLE = no
-STENO_ENABLE = no
-VIRTSER_ENABLE = no
+STENO_ENABLE = yes
+VIRTSER_ENABLE = yes