Customization options in other pages that are not “Homepage” or

Hello Goodnight! I am new to wordpress and I need your help. I really like the customizations of the Zubin theme. However, I can only use it on "Homepage" or "Entire site". I don't know how to use a customization (eg, Veneue or any other) only and exclusively on a specific page of my site, a page other than "Homepage" or "Entire site". Thank you.