The tool bar appears along the top of the Viewer. It contains buttons to copy, print, etc., the document. For a multi-page document, it looks like this:

... the 5 navigation buttons will not appear if you view a single-page document. The leftmost buttons will:

• Print this page. Print only the displayed page on the current printer.
• Print all pages (Ctrl+P). Print all pages in this document on the current printer.
• Zoom to full page (- on the keyboard). Reduce the size of the displayed page so that the entire page is visible in the document area.
• Zoom to page width. Reduce or magnify the size of the displayed page so it occupies the full width of the document area.

The rightmost button (in a multi-page document) will display a simple popup dialogue to jump to a selected page by number or by bookmark (if there are any bookmarks in the document). Hit F5 to shortcut to this dialogue.