I cannot get two rectangles to overlap in Visio 2013! For various reasons I need overlapping rectangles in my diagram. How can I do that?
I have similar problem on Visio 2010 call sequence diagram. The fix is simple - Turning off "Move other shapes away on drop" in "Layout and Routing" tab in the Page Setup.
Enable in Visio 2013 the Developer Mode (Options --> Customize Ribbon --> Select Developer). Next put two rectangles on the page and select both, then on the Developer Tab click on Operations and choose Union or Combine. You can also just put the two rectangles one on the other and they will overlap. You can then group them to make them behave as one object.
This is Union:
This is Combine:
Put one rectangle on top of the other: