Compare Files

Using Visual Studio Express 2013, I see an option under: View, Toolbars, Compare Files

By default: Side by Side mode and Auto-synchronize views is On in the toolbar.

But I don't know how to compare two files. For example: "one.sql" and "two.sql" using the Compare Files toolbar

I tried selecting both files and right clicking them, but I see no option to initiate the comparison; and I see no option in the toolbar to run the comparison either.

Any ideas?