Adobe Reader is created by the author of PDF format: Adobe Corporation. Is a free program that enable users to open and view content of files that have a .pdf extension. PDF documents have a large popularity and are often shared through email, e-book downloads, invoices etc.
1. Clean interface
That are not many buttons and menus and it should be like that because the main purpose of a document viewer is to display its content. Also, is important to offer some functionalities such as zoom or printing.
2. Thumbnails for pages
3. Search within document
4. Many Zoom options
I find useful the variety of options for zoom in/out. You can zoom to a custom percent, use dynamic zoom with scroll of your mouse, fit entire document to current size of your desktop or even view full screen.
5. Printing customization
Once you decide to print a PDF document, Adobe Reader offers many useful options ready to select with one click. You can print all pages or desired ones, fit or shrink large pages, use portrait or landscape and more.