Canon Speedlite EL-5 Advanced User's Manual page 38

LCD Panel Illumination
The LCD panel is illuminated for approx. 12 sec. ( ) in response to button or dial
operations.
For details on LCD panel illumination when the Speedlite is set as a sender in radio
transmission wireless flash photography, see LCD Panel Illumination.
Note
LCD panel illumination can be changed in C.Fn-22.
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