STP breaks, how to make it so?

Question

Cisco

Greetings. The question is theoretical.
There is a core network - a distribution switch - an access switch.
How to make the access switch not try to become root?
Probably an option to change its priority? What settings for the trunk port are applied and on which side?

Another additional question: do I understand correctly: BPDU Guard, portfast - are applied only on the ports on which the host is connected