What is one technique raphael sanzio uses to create emphasis in marriage of the virgin?

It would be much better if you attached  some options so that I could know whether my suggestion coincides with yours. Even though you didn't support your question with options, I've got what you need : He positions many of the figures so that they are gazing at the central figure. I am pretty sure you have the same in the option-box as this shows a technique used in marriage of the virgin.