Change the Font Used for Outline View
The Problem:
I've learned to click the Show Formatting button on the Outlining toolbar to turn off the display of formatting in Outline view, but I'd like to use a different font for working in this view.
The Solution:
You just need to change the default font for the template attached to the document. Choose Format 
Font, select the desired font details, click the Default button, and click the Yes button in the confirmation dialog box.
Be warned that this change will also affect other views if your styles use the default font. If you want to use this particular font only when using Outline view, create a new template with this font as the default. Attach the new template to the document when you want to work in Outline view, and reattach the document's previous template when you switch to a different view. (This solution is practical only for protracted sessions in Outline view. If you want to flip back and forth between Outline view and other views, it won't do you much good.)
Tip: If, when you switch views, the current selection disappears from the screen, press the left arrow key and then the right arrow key to bring it back into view.