What is the difference between HTML and PDF formats?
“HTML format” means that the content is displayed as a web page, which is good for browsing an article on screen. A PDF (portable document format) is better for printing because it will preserve the layout that was presented in the print journal, including illustrations. You can also save a PDF to your computer’s hard drive. Adobe Reader software is commonly used to open PDF files. If it is not already installed on your computer, you may download it here for free.