How can I reset font styles?

I like using the Master view to change the style of every slide at once, but sometimes I have already made a change on an individual slide (for instance, I want all titles to be in Verdana, but I have already set one slide's title to Arial). The individual slide won't change, I guess because individual changes take priority over Master style changes. However, I can't figure out how to remove the individual style or how to force it to revert to the Master style. I can do this with the title text box fill colour, for instance, using the "Reset Graphics" button on the style menu. But I don't know how to do this for text styles (font, font colour, etc). Can anybody help me?