Hello,
If you ask about using pagination in pages. You could review code snippet below
// Retrieves pages of the specified page type that match the query
var pages = new DocumentQuery("Custom.Smartphone")
.OnCurrentSite()
.Path("/Products")
.Culture("en-us")
.Page(0,10) //this
.CombineWithDefaultCulture()
.PublishedVersion();
I've attached related document about that
https://docs.xperience.io/custom-development/working-with-pages-in-the-api
If you're not asking about pages/documents, I need more detail
Regards