readExternalDisplaySettings

read external display settings, return only that settings which are available in printer

Return

map keys - autoBacklightOffTime (time to turn off the display backlight, given as the total decimal number); backlightIntensity (intensity of the display backlight, given as an integer decimal number between 0 and 100); allLinesExceptTheSalesItemColor (read color of all lines except sale); screensaverKind (type of screen saver); backgroundColor (read background color); saleItemLineColor (read color of sale item line); priceXQuantityLineColor (read color of value line); priceColor (read color of price); subtotalColor (read color of subtotal); totalColor (read color of total)