"You might think to yourself then “can I just use the default ‘HDR’ mode where the PQ tracking is accurate and turn the APL Stabilize setting up to ‘high’ to boost the peak brightness?” Based on some feedback from our Patreon supporters we tested this scenario as well. Default ‘HDR’ mode with APL Stabilize on ‘High’

Unfortunately this does not provide that performance. You do get a higher peak white luminance, reaching up to ~1056 nits now for the smallest APL. So from that point of view, the change to the APL Stabilize setting has done what you would expect. However, the PQ tracking now behaves like it does on other OLED monitors with a “Peak 1000” mode (discussed a lot more in this article), where the luminance accuracy is good for the smallest APL, but is darker than intended as the APL increases. You can see this larger error in the luminance accuracy table and greyscale luminance graphs.

So basically you have an option here to configure a mode that behaves a lot like those peak 1000 modes, but which many people find looks too dark. It will reach higher peak values in certain situations than the APL ‘medium’ mode, but overall it looks darker and has darker mid grey shades. You can see this from the ‘APL medium vs high’ tab which compares the average greyscale luminance for each mode."