title: How to change the default font size in ggplot2 - including geom_text
body: <p><a href="https://stackoverflow.com/questions/11955229/how-to-change-the-default-font-size-in-ggplot2">This post</a> was great to set a base size for all my plots in R Markdown docs, which I usually work in (e.g., <code>theme_set(theme_grey(base_size = 18))</code>. However, as someone eluded to in the comments, <code>geom_text()</code> does not inherit <code>theme_set()</code>. Have any suggestions?</p>
  
  <p>I am open to completely different ideas for managing font size in ggplot plots in R Markdown. FYI, I usually knit to Word and then upload to Google Drive.</p>