Q. How can I save articles to PC or tablet so they can be reviewed without be logged on to the Internet? Also, is there a way to highlight and take notes without printing?

Each of the library journal article databases have different functionalities.

The process of viewing without being on the internet would involve downloading the article. Once the article is downloaded, the ability to highlight or take notes,would depend on the software or services on your tablet or computer. 

Some of the Vendors/Publishers such as ProQuest provide options to create an account and make notations or highlight articles while online,