This is where to begin! Adobe Photoshop Basics walks you through Photoshop step by step, with an emphasis on Astrophotography. Twenty-One Video Tutorials comprise this first series of IP4AP's Online Visual Learning.
Please note that Photoshop Basics is part of our 'Legacy' series of tutorials and very dated. The information in most cases are still valid for many of the techniques presented. We provide them here as a courtesy to our subscribers.