How to set Registration Reference Image

I can’t find where we set the registration reference image.
Otherwise, what does the program use?
Also it does no find enough stars in my images to process any of them.
These are .5 or 1 second images from lucky imaging.
With PI I must tweak the star detection parameters for it to find stars.
Is there a way to change these parameters in Sirilic?

In the released version, when using the scripts, the reference image is chosen as the first image of the second. The development version has a two-pass registration that will look for the best image of the sequence and choose it as reference.

The star detection settings can be set either from the Siril GUI (PSF window) or using the setfindstar command, I don’t know if sirilic exposes that.

Maybe it’s better to process your images manually if you need to tweak things.

Thanks Vincent for the info. We give it a go.