How to create '.h' and '.cpp' files in Arduino (Arduino Output, Lesson 8)

[elibaldwin]

It would be good if there was detail on how to:

• create new .h or .cpp files from within the Arduino IDE?
• make them appear in the editor

It sounds like doing this through the 'new tab' functionality works; I didn't know about this before asking about it in class, so it could be good for it to be included in the lesson instructions