Basics:  Making the screen lighter or darker

1. To make the screen darker, press 2nd + UP arrow
2. To make the screen lighter, press 2nd + DOWN arrow.
   
   Repeat steps until the screen is at the desired brightness.
   A box appears in the upper right corner of the screen with a number from 0 to 9.
   0 is the lightest, and 9 is as dark as it can be.
   As battery power diminishes, you'll need to darken the screen to see it well.
   When the number reaches 8 and is still too light, go buy batteries.