Sekonic Speedmaster L-858D-U Light Meter - Manual (Page 193)

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6. Functions
4.
Touch [Close] Button on the Custom Setting Menu Screen.
The display returns to the Menu Screen.
5.
Touch [Close] Button on the Menu Screen.
The display returns to the Measuring Screen, and the updated content is applied
to the Measuring Screen.
Custom Setting Menu Screen Menu Screen
[Close]
Button
[Close]
Button
NOTICE
The additional data is not displayed in the viewfinder in the reflected light system.