Yesterday I found myself needing to zoom my Visual Studio text editor and was without a mouse (don't ask). Typically I do this by holding down CTRL and scrolling the mouse wheel. I also couldn't figure out how to tab into the area where you can specify your zoom level in the lower left hand corner of the text editor window.
So I guess I have two questions:
I don't know if there is a menu option, but there are keyboard shortcuts to set the zoom level.
ctrl+shift+. to Zoom In
ctrl+shift+, to Zoom Out