title: Increasing area around plot area in ggplot2
body: <p>How can I increase the area around a plot area in ggplot 2 to give my axis titles some breathing room. I am aware of vjust and hjust (as below), however, I can't seem to create actual space around the plotting area to move my axes titles onto.</p>
  
  <pre><code>p &lt;- ggplot(mtcars, aes(x = wt, y = mpg)) + geom_point()
  p
  
  p&lt;- p + theme(axis.title.x = element_text(family="Times",size=20,face="bold",colour = "Black",vjust=-1,hjust=0.5)) 
  p
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/Rxrjq.png" alt="enter image description here"></p>