Nikon D750 DSLR Camera (Body Only) - Manual (Page 362)

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This option controls whether the E button is needed to set
exposure compensation ( 0 143). If On (Auto reset) or On is
selected, the 0 at the center of the exposure display will flash
even when exposure compensation is set to ±0.
b3: Easy Exposure Compensation
G button
➜
A Custom Settings menu
Option Description
On (Auto reset)
Exposure compensation is set by rotating one of the
command dials (see note below). The setting selected
using the command dial is reset when the camera turns
off or the standby timer expires (exposure
compensation settings selected using the
E button are
not reset).
On
As above, except that the exposure compensation
value selected using the command dial is not reset
when the camera turns off or the standby timer expires.
Off
Exposure compensation is set by pressing the E button
and rotating the main command dial.
A Change Main/Sub
The dial used to set exposure compensation when On (Auto reset) or
On is selected for Custom Setting b3 ( Easy exposure compensation )
depends on the option selected for Custom Setting f5 ( Customize
command dials ) > Change main/sub ( 0 363).
Customize command dials > Change main/sub
Off On
Mode
P Sub-command dial Sub-command dial
S Sub-command dial Main command dial
A Main command dial Sub-command dial
M N/A