The Develop – Enable HDR adjustments in Develop by default for HDR photos setting determines how the Develop module treats files that are not RAW files and contain HDR data. Three options are available:
Off – files will be edited in standard dynamic range.
On – files will be edited in high dynamic range, which means that the HDR button in the Color Style section in the Develop module will be automatically turned on.
Automatic – files will be edited in high dynamic range if the user has an HDR monitor and the use of HDR has been turned on within the operating system’s settings. If these conditions have not been met, files will be adjusted in standard dynamic range.
Undeveloped SDR files that are not RAW files are always edited in standard dynamic range. Undeveloped RAWs will be adjusted based on the choice of default setting in the Develop module.