how can get final pdf height


In my requirement, I only want to get a page of pdf, but the document does not have this attribute, so I look at it from the perspective of the default page, as shown in the figure, but the provided API does not have attributes like x, y, I not working

Start by reviewing the public API for PDF pages and the default-page handling described in the issue, then compare it with the document layout information available internally. Done means defining and exposing a clear way to obtain the final PDF height, including the requested page scope and coordinate semantics.

Written by the indexing model from the issue text.