The behavior of mouse button 2 within the Source window depends on the Mouse button 2 behaviour group box in the Debugger properties dialog group box.
One of three possible events occur when clicking on mouse button 2:
C++ example:.If Popup menus and step in white space is checked, and you click mouse button 2 on the C++ source line int myVar=18;, a popup menu appears if the pointer is over int, myVar, or 18, and a step command is performed if the pointer is on white space or the = or ; symbols.
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Change Mouse Button 2 Behavior