list of symbols added

README.md

@@ -11,3 +11,5 @@ Type by click or number keys of your keyboard.
 | `F3`      | Copy to clipboard   |
 |`Backspace`| Delete last letter  |
 | `F6`      | Clear text field    |
+
+[List of symbols for each button](./doc/Symbols.md)

doc/Symbols.md

@@ -0,0 +1,14 @@
+ ## Symbols
+
+ |Key  | List of symbols|  | Key | List of symbols |
+ |-----|---------|-|-----|---------|
+ | `0` | `0@°%[]`||     |         |
+ | `1` | ` 1"()` || `8` | `tuvüû8`|
+ | `2` | `abcäç2`|| `9` | `wxyz$9`|
+ | `3` | `deféèê3`|| `,` | `,.!?:;`|
+ | `4` | `ghi4`|| `-` | `-_=<>`|
+ | `5` | `jkl5`|| `/` | `/\|`|
+ | `6` | `mnoöô6`|| `*` | `*^{}`|
+ | `7` | `pqrsß7`|| `+` | `+&`|
+
+