PS Viewer provides tools to that let you navigate a document. Use the Go To command to choose the exact page and section number to which you want to navigate. When you finish reading or viewing a page, you can use the Page Down command to see the next page in the document. PS Viewer lets you navigate quickly to the beginning or end of your document.
Instead of scrolling through a long document, use the Read Down command to read pages in sections starting with the top section of the page.