In case of a camera with user settings it’s easy to store the equivalent setting
(exposure mode, metering mode, exposure compensation).
For example with the Nikon D750 → @mikemyers
- Metering Modes (manual pdf p.167 / print p.139)
-
- Center-weighted
-
- Spot
-
- Highlight-weighted → close to Auto ETTR
- User Settings (pdf p.127 … / print p.99 …)
User setting [ U1 ]
- Manual exposure
- (normal) Spot metering
- Exposure compensation fixed to +1 2/3
User setting [ U2 ]
- Aperture priority
- Center weighted metering
- no (fixed) Exposure compensation
That way, one has 2 (3) different settings at hand.