On other screens (I like the one big dial and 6 small), I found if you double tap on any of the display spots, a menu will pop up and allow you to change a variety of readings ... the item your monitoring and set a "Warning Limit" should the sensor either exceed one limit or fall below another limit. If you don't, the first number of items in alphabetic order in the Config pops up.
I suspect ALL screens are changeable by tapping on the display spot you want to change. It took a while to get the nack of tapping but if your tap twice quickly, and nothing happens, wait a few moments and try it again. Eventually you will get it.
As well, I like to look at the Knock Retard and the Cylinder Head Temp.