title: How to turn off the "Hit <Return> to see next plot" prompt plot3D?
body: <p>When using <code>persp3D</code> in package <code>plot3D</code>, there's only one plot produced but I still have to respond to the "Hit &lt;Return> to see next plot" prompt. Is there a way to turn it off? </p>
  
  <p>More generally, when there <em>are</em> multiple plots, do packages typically provide a way to specify a particular plot to show, similar to the <code>which = c(1:3, 5)</code> argument in <code>plot.lm</code>? </p>