Synchronous Scrolling in AmiBroker

Original AFL from Re: synchronised scrolling
I did a slight modification.

<Usage>
Put this AFL in the Include Folder.
Add below 2 lines into your AFL
  UseZoomer = ParamToggle("Use Zoomer?", "No|Yes", 0);
  #include_once <iZoomer.afl>

Futures Contract Margin and Percentage over Close