Poser 11 pro, Windows 10 64bit

I would like to know how to move the eye centers with a single master head scale dial. I can set the center for each size easily in the joint parameters but it would be better if they adjust automatically. I know Victoria 4 does this perfectly but I could not find any information on how it is done.

I also tried to use dependent parameters to move the eye centers but there is no center parameter available for linking to the master dial. Only offsets were shown but those are not explained in the manual.

I am using the Victoria 2 figure with a head morph that scales the head and eyes.

thanks for any info.