title: Control 'base' point size in ggplot aes(size)
body: <p>I am looking for a way to increase or decrease the all the points in the graph below with a factor. I can control the within the aes. And I can control the size outside aes. But I can't figure out how to combine both.    </p>
  
  <pre><code>df &lt;- data.frame(val1 = rnorm(10, 5), val2 = rnorm(10, 5), size = rnorm(10, 5))
  ggplot(df) + geom_point(aes(val1, val2, size = size))
  </code></pre>
  
  <p>Thanks in advance for your time.</p>