Update v1.2.0.md

Author: cubewise-tryan

releases/v1.2.0.md

@@ -2,6 +2,7 @@
 
 ## Enhancements
 * You can now request license files while **offline**, i.e if you are using Arc in a resticted location such as a server you will be provided with details and instructions to request a license.
+* The default action for a cube is now to open the cube viewer, to open the rules click on the sub-menu **Rules**
 * Arc uses now a new multi-window layout manager:
   * You can view editors side-by-side, for example cube rules on one side and cube viewer on the other.
   * To use the new layout manager drag the tab heading to the location you want the editor to be located. It can be to left/right, top/bottom or beside another tab.