3.3.1.3-2 Legend

The legend should be readable under all environmental conditions.

Additional Information:
The legend should be readable under ambient light conditions, with or without internal illumination. The illuminated condition should be clearly recognizable under the highest predicted ambient light condition and should be at least 10 percent brighter than the surrounding panel. Legend lettering and contrast should conform to recommendations for legend lights (Guidelines 1.6.5-7 and 1.6.5-8). The legend message should be specific, unambiguous, and concise. The legend message should contain no more than three lines of lettering.