Once you have HDFView installed, bring it up and you are ready to begin the tutorial.
This tutorial requires that the default HDFView File Access Mode be Read / Write. If fields are greyed out so that you cannot select them, then the File Access Mode is Read Only.
To change the File Access Mode follow these steps:
PLEASE BE AWARE that selecting a File Access Mode of Read / Write can result in changes to the timestamp of HDF files that are viewed with HDFView. In general, a File Access Mode of Read Only should be used to ensure that this does not occur.