Update README.md

Author: RomanSoloweow

README.md

@@ -11,6 +11,7 @@ If you like or are using this project please give it a star. Thanks!
 
 ## Сontent
 1. [Features](#Features)
+2. [Shortcuts](#Shortcuts)
 2. [License](#License)
 
 ## Features
@@ -38,6 +39,32 @@ If you like or are using this project please give it a star. Thanks!
 ![](https://github.com/SimpleStateMachine/SimpleStateMachineNodeEditor/blob/gh-pages/img/xml.jpg)
 ### Save work space as PNG/JPEG
 ![](https://github.com/SimpleStateMachine/SimpleStateMachineNodeEditor/blob/gh-pages/img/jpg.jpg)
+
+## Shortcuts
+* Ctrl + A = Select All Nodes
+* Ctrl + S = Save
+* Ctrl + Shift + S = Save As
+* Ctrl + Shift + O = Open
+* Ctrl + Shift + N = New
+* Alt + F4 = Exit
+* Ctrl + Shift + Alt + P = Export to PNG
+* Ctrl + Shift + Alt + J = Export to JPEG
+* Ctrl + Z = Undo
+* Ctrl + Y = Redo
+* Ctrl + N = Add Node
+* Ctrl + LMB on Canvas = Start Select
+* Ctrl + LMB on Connector = Create Loop
+* LMB on Node = Select one Node
+* Ctrl + LMB on Node = Select/UnSelect Node 
+* Ctrl + LMB on Transition = Select/UnSelect Transition
+* Shift + LMB on Transition = Multiple selection
+* LMB on Connector = Start create Connect
+* Alt + LMB on Connector = Move Connector in Node
+* Alt + LMB on Canvas = Start Cut
+* Delete = Delete Selected Elements
+* C + Delete = Delete Selected Connector
+* N + Delete = Delete Selected Nodes
+
 ## License
 
 Copyright (c) SimpleStateMachine