+Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. To define your own keymap create file named `keymap_<name>.c` and see keymap document(you can find in top README.md) and existent keymap files.
+
+To build firmware binary hex file with a certain keymap just do `make` with `KEYMAP` option like:
+
+ $ make KEYMAP=[poker|poker_set|poker_bit|plain|hasu|spacefn|hhkb|<name>]
+
+
+### 1 Poker
+[keymap_poker.c](keymap_poker.c) emulates original Poker layers
+while both [keymap_poker_bit.c](keymap_poker_bit.c) and [keymap_poker_set.c](keymap_poker_set.c) implements same layout in different way and they fix a minor issue of original Poker and enhance arrow keys.
+
+ Fn + Esc = `
+ Fn + {left, down, up, right} = {home, pgdown, pgup, end}
+
+#### 1.0 Default layer
+ ,-----------------------------------------------------------.
+ | `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|Backsp |
+ |-----------------------------------------------------------|
+ |Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| \|
+ |-----------------------------------------------------------|
+ |Caps | A| S| D| F| G| H| J| K| L| ;| '|Return |
+ |-----------------------------------------------------------|
+ |Shift | Z| X| C| V| B| N| M| ,| .| /|Shift |
+ |-----------------------------------------------------------|
+ |Ctrl|Gui |Alt | Space |Fn |Gui |App |Ctrl|
+ `-----------------------------------------------------------'
+#### 1.1 Poker Fn layer
+ ,-----------------------------------------------------------.
+ |Esc| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12| |
+ |-----------------------------------------------------------|
+ | |FnQ| Up| | | | | | |Cal| |Hom|Ins| |
+ |-----------------------------------------------------------|
+ | |Lef|Dow|Rig| | |Psc|Slk|Pau| |Tsk|End| |
+ |-----------------------------------------------------------|
+ | |Del| |Web|Mut|VoU|VoD| |PgU|PgD|Del| Up |
+ |-----------------------------------------------------------|
+ | | | | FnS |Fn |Left|Down|Righ|
+ `-----------------------------------------------------------'