title: How to visualize a long conversation thread?
body: <p>Suppose I have a long conversation thread (A replied to B, which replied to C, which replied to D, etc.). I would like to display the entire conversation as a tree but what if the tree does not fit the window? </p>
  
  <p>I can display the whole tree anyway but the user will have to scroll the window left/right and up/down. Are there any better solution?</p>
  
  <p>Do you know examples of UI (web/desktop), which display large trees (not only conversations) properly? </p>