I found this on Google..."The Peak Focus feature adds a kind of red static-looking effect around edges to indicate focus, the Threshold setting adjusts the point at which the effect activates. Some find the feature annoying, I find it useful as a focus reality check."
The red indicates over exposed areas of image. You can tap screen on that area and it will expose properly but the darker areas of image will then become under exposed. It’s a common challenge in shooting subjects with different lighting characteristics. I prefer to properly expose the brightest areas like the sky and post edit the darker areas ‘up’. The other thing you can do is try to compose in better light. Not always possible from the air tho
You are correct. Nice a friendly response tho . I was reading too quickly. Most aren’t shooting manual. In this case red dots would indicate areas that are IN focus. Thanks for the correction. Have a great day.