I'm wondering how I can manipulate the size of strip text in facetted plots. My question is similar to a question on plot titles, but I'm specifically concerned with manipulating not the plot title but the text that appears in facet titles (strip_h).
As an example, consider the mpg dataset.
qplot(hwy, cty, data = mpg) + facet_grid( . ~ manufacturer)
The resulting output produces some facet titles that don't fit in the strip.
I'm thinking there must be a way to use the grid to deal with the strip text. But I'm still a novice and wasn't sure from the grid appendix in Hadley's book how, precisely, to do it. Also, I was afraid if I did it wrong it would break my washing machine since I believe all technology is connected through The Force :-(
Many thanks in advance.