You can switch OFF the backlight (illumination) of the LCD screen of the E5063A. This extends the life of the backlight when it is used continuously over a long period.
Press System > Backlight to switch the backlight ON/OFF.
Switching OFF the backlight causes the indications on the LCD screen to be almost invisible.
The backlight that has been switched OFF can be turned ON again by pressing any key from the front panel.