The file extension allows you to identify the type of each file present on your computer. Unfortunately, these file extensions are hidden by default on most operating systems. This project is an interactive video tutorial which tells you more about file extensions and shows you how to show the file extensions both on Mac and on Windows. For example, the user is able to choose which version of the project (Mac or Windows) he / she wants to see. Knowledge check questions and Drag and Drop interactions are used throughout the project to challenge the user and check his / her new knowledge.

This project also ensures that the viewer only sees the part of the tutorial that is relevant to his/her situation.