Windows could really use a "super maximize" button to maximize a window across all monitors. I know that software packages made for managing multiple monitors have this functionality, but I would like it baked into Windows.
In any case, the program where I most often find myself manually resizing the window to span my two monitors is Excel. A while ago I got sick of doing that, so I wrote a simple macro to do it. Here's the code:
You can put that macro in your personal macro workbook and assign it to your quick access toolbar for easy access.
Once Excel is maximized across your workspace, you may want to have two or more workbooks displayed side-by-side. You probably know that you can do that by going to View --> Arrange All --> Vertical.
However that's three steps I found myself struggling to recall the specifics of. So, another simple macro for your quick access toolbar would be:
I hope someone finds this useful.