Sony ILCA-99M2 Manual page 337

Menu item details
SS F/no.:
The front dial is used to change the shutter speed and the rear dial to change the aperture
value.
F/no. SS:
The front dial is used to change the aperture value and the rear dial to change the shutter
speed.
Note
The [Dial Setup] function is enabled when the shooting mode is set to "M."
[360] List of MENU items
Dial Ev Comp
You can compensate the exposure using the front or rear dial. You can adjust the exposure in a
range of -5.0 EV to +5.0 EV.
MENU →
1
Menu item details
Off:
Does not enable exposure compensation with the front or rear dial.
Front dial/
Enables exposure compensation with the front or rear dial.
Note
When the exposure compensation function is assigned to the front or rear dial, any function that had
been assigned to that dial previously is re-assigned to another dial.
[361] List of MENU items
MOVIE Button
Sets whether or not to activate the MOVIE (Movie) button.
Camera Settings2
(Camera Settings2) → [Dial Ev Comp] → desired setting.
Rear dial:
Camera Settings2