My personal favorite settings for Ricoh GR IIIx/RICOH GRIII:

1. P (Program) mode
2. Autofocus (default)
3. AE Metering (auto exposure metering): Highlight-Weighted
4. File: JPEG // Small JPEG (no RAW)
5. Auto power off / Sleep mode: 30 minutes
6. Volume: 0
7. Customize settings: Instant review (OFF)
8. Grid style: 4×4 Grid
9. Shooting info display: Just turn on the grid guide (press DISP on the back-right button of the RICOH GR III/X to scroll through the display shooting modes)
10. Image Control: Hi/BW (high contrast black and white): press FN button to customize Contrast +4, Contrast highlight/contrast shadows to +4, Sharpness +4, Grain Effect 3)