Here is a link to Adobe. You will get instructions there on installing the program. Click on the magnifying glass on the toolbar, then click on the document to enlarge displayed text. To return to a smaller size, press Ctrl while clicking or use the page icons near the right end of the toolbar or the View menu. On the toolbar, the third icon from the left will display bookmarks if they exist.
Bookmarks provide a quick way to skip to particular parts of a document.
Not all documents have bookmarks, but longer ones frequently do. All rights reserved.