When we have all our emails read, the background color on the email turned to light grey. Say I have 10 read emails on top half of the screen, i clicked on the first one and I can read that email in the lower half of screen. Then I start moving down to 2,3,4th email one by one and keeps reading them. But at one point I forgot that what email I am on because all the emails in the list has the same background color, and the email that I clicked on, does not show any different background color. Therefore it gets very confusing at times that what email I am actually reading.