Dell Venue 8 - Secret Codes Screen
Accidentally, I found that the Dell Venue 8 has a dialer screen. This screen can be used to enter "secret codes". The only one that I have found that works is *#*#4636#*#* (or *#*#INFO#*#*). This brings up a "hidden menu" with Tablet Information, Battery Information, Usage Statistics and Wi-Fi Information items.
There might be other codes that work on this tablet. I have not found any others that work.
To access the screen open the Settings app. Go to About Tablet and tap repeatedly on Software Version.