Make changes to advanced settings and then apply to all images

Hi

Newbie

I am select all imported RAW images, I then go to Advanced settings which seem to default to 72 and 100 (is this a default or does it automatically assess the image and apply what it thinks is best?) I then adjust to 40 and 10 but it only applies to the first image and not them all. How do I apply to all?

Any advice appreciated

BC