On Saturday 17 January 2015, Dan Youngquist wrote:
> > 2. It "forgets" a page as soon as it's no longer displayed, and has to
> > re-render it to display it again. �It's as though Memory Usage is set to
> > Low instead of Normal or Aggressive, but the setting makes no difference.
> > �This is very inconvenient in cases where it takes more than a fraction
> > of a second to render a page, which is the case with most of the PDFs I
> > use.

I tested this on TDE 13.2 and saw that the default behavior is to start the 
new page with a scaled thumbnail and then to render.  You have to scroll 
quickly to see this.