I've got 2 monitors, and most of the time I've got some reference material open on one screen, and Visual Studio on the other. To really get in the zone, though, I need my code to be the only thing I see. Does anyone know if it's possible to have multiple code windows in Visual Studio? So far the best I can do is put debugger output and the solution explorer on my left monitor, and the rest of VS on the right. I would love to have code on both windows, however.
If you right click on the file tabs, there's an option for "New Vertical Tab group" Just maximize across both monitors and put the divider on the monitor divide and I think that's what you're after.
See also the "Visual Studio and dual/multiple monitors: how do I get optimized use out of my monitors?" question.
Though I use StudioTools for other purposes, it has a "Tear off Editor" option, with which you can "tear off" the file to a window and resize the window. Find it quite helpful
Instead of enlarging the VS2008 window to span the two monitors, you can display the 'Code Definition Window' on another monitor: just drag it outside the main window! I find this very handy to avoid switching between code windows: it is very often that one is interested in the definition of the symbol under the cursor...
The same is true for other windows like the 'Class View', the 'Call Browser', etc. You can choose to keep them grouped in the same group with tabs, or drag each of them separately (click on the label of the tab to start the drag).
来源：https://stackoverflow.com/questions/101745/multiple-monitors-with-visual-studio-2008