diff --git a/keymap.c b/keymap.c
index 2d92e1872..b5d83cbc8 100644
--- a/keymap.c
+++ b/keymap.c
@@ -7,6 +7,60 @@
 
 int current_layer = 0;
 
+/*
+ * Layer0(Default Layer)
+ * ,----------------------------------------------------------.
+ * |Esc|  1|  2|  3|  4|  5|  6|  7|  8|  9|  0|  -|  =|Backsp|
+ * |----------------------------------------------------------|
+ * |Tab |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|     |
+ * |----------------------------------------------------'     |
+ * |Contr|  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Return  |
+ * |----------------------------------------------------------|
+ * |Shift  |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift |Fn2|
+ * |----------------------------------------------------------|
+ * |Fn3|Gui |Alt  |Space                |Fn1  |Lef|Dow|Up |Rig|
+ * `----------------------------------------------------------'
+ * 
+ * Layer1(with Fn1)
+ * ,----------------------------------------------------------.
+ * |  `| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Delete|
+ * |----------------------------------------------------------|
+ * |  \ |   |   |   |   |   |   |   |   |   |   |   |   |     |
+ * |----------------------------------------------------'     |
+ * |Contr|   |   |   |   |   |Lef|Dow|Up |Rig|   |   |  \     |
+ * |----------------------------------------------------------|
+ * |Shift  |   |   |   |   |   |Hom|PgD|PgU|End|   |Shift |   |
+ * |----------------------------------------------------------|
+ * |   |Gui |Alt  |                     |Fn1  |Lef|Dow|Up |Rig|
+ * `----------------------------------------------------------'
+ * 
+ * Layer2(with Fn2)
+ * ,----------------------------------------------------------.
+ * |  `| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Delete|
+ * |----------------------------------------------------------|
+ * |  \ |   |   |   |   |   |   |   |   |   |   |Up |   |     |
+ * |----------------------------------------------------'     |
+ * |Contr|VoD|VoU|Mut|F20|   |  *|  /|Hom|PgU|Lef|Rig|  \     |
+ * |----------------------------------------------------------|
+ * |Shift  |   |   |   |   |   |  +|  -|End|PgD|Dow|Shift |Fn2|
+ * |----------------------------------------------------------|
+ * |   |Gui |Alt  |                     |     |Lef|Dow|Up |Rig|
+ * `----------------------------------------------------------'
+ * 
+ * Layer3(with Fn3)
+ * ,----------------------------------------------------------.
+ * |  `| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Delete|
+ * |----------------------------------------------------------|
+ * |  \ |   |   |   |   |   |   |   |   |   |   |   |   |     |
+ * |----------------------------------------------------'     |
+ * |Contr|Mb1|Mb2|Mb3|   |   |McL|McD|McU|McR|   |   |  \     |
+ * |----------------------------------------------------------|
+ * |Shift  |   |   |   |   |   |MwL|MwD|MwU|MwR|   |Shift |   |
+ * |----------------------------------------------------------|
+ * |   |Gui |Alt  |Mb1                  |Mb2  |MsL|MsD|MsU|MsR|
+ * `----------------------------------------------------------'
+ * Mc: Mouse Cursor / Mb: Mouse Button / Mw: Mouse Wheel 
+ */
 static const uint8_t PROGMEM Keymap[][MATRIX_ROWS][MATRIX_COLS] = {
     // 0: default
     {