Extended Trend HD Depth

Extended Trend HD Depth

Hi Support,
Can you explain the term 'HD Depth' that is shown when we configure the Extended Trends Picture for the very first time? What exactly is the meaning of the Numerical figure that is shown as HD Depth?
Thanks.

This is a migrated post! Originally posted on 09.05.2011 by user shikra. Please be aware that information can be outdated.