title: How to screen-capture an entire Bootstrap 3 modal dialog which scrolls off the screen
body: <p>I am trying to screen-capture a Bootstrap3 modal dialog that scrolls off the screen vertically.</p>
  
  <p>All the screen capture extensions I have tried in Chrome and Firefox simply capture the visible area of the window, even if I select "entire page".</p>
  
  <p>The scroll bars are present - why can't these utilities tell how tall the modal dialog is, and how can I capture the entire thing in one shot?</p>
  
  <p>(Otherwise I'm going to have to cut pieces and stitch them together!)</p>
  
  <p>Thanks!</p>