How to Open a PDF File With Yahoo Mail. The Portable Document Format makes it possible for you to open and view documents, no matter what operating system, software or computer you have.

When you double-click on a file in Windows, it will automatically open a default program that is configured to manage these types of files. It is common, though, want or need to use a different ...

Double-clicking apps and docs to open them isn't exactly hard. But what if you want to open them automatically at a specific time or under specific circumstances? Topher Kessler explains how to ...