display pages with the header on different positions (top, top-sticky, left, right)
This is possible with PRO Headers. Create multiple Headers with different positions then assign them to the corresponding pages.
Please check the link below
Display boxed pages and fullwidth pages
Yes, you can select different templates for your page.
display pages with several preset (color, font, etc...). Could you please provide a template that I would only need to modify with the entire options? (or indicate me where to find it)
If you are using PRO you can download available templates from Design Cloud.
Please refer to the link below for your guide about templates.
Hope this helps