Sony ILCE-6500 Manual page 294

When [Focus Area] is set to other than [Flexible Spot] or [Expand Flexible Spot], the spot metering
position is locked to the center.
When [Focus Area] is set to [Lock-on AF: Flexible Spot] or [Lock-on AF:Expand Flexible Spot], the
spot metering position coordinates to the Lock-on AF start position, but does not coordinate with the
tracking of the subject.
[311] List of MENU items
Exposure step
You can set the setting range for the shutter speed, aperture, and exposure compensation
values.
MENU →
1
Menu item details
0.3EV/0.5EV
[312] List of MENU items
AEL w/ shutter (still image)
Sets whether to fix the exposure when you press the shutter button halfway down.
Select [Off] to adjust the focus and the exposure separately.
MENU →
1
Menu item details
Auto:
Fixes the exposure after adjusting the focus automatically when you press the shutter button
halfway down when [Focus Mode] is set to [Single-shot AF]. When [Focus Mode] is set to
[Automatic AF], and the product determines that the subject is moving, or you shoot burst
images, the fixed exposure is cancelled.
On:
Fixes the exposure when you press the shutter button halfway down.
Off:
Camera Settings1
(Camera Settings1) → [Exposure step] → desired setting.
Camera Settings1
(Camera Settings1) → [ AEL w/ shutter] → desired setting.