No matter how well you know a medium or program, always read (or at least skim) tutorials, educational books, and help files. It is a rare person who truly knows everything about his business. I seriously doubt that even the creators of Photoshop realise all that it can do. Maybe. But they would be among the rare few. The true "masters" of oil painting would be harder to pin-point. Did Raphael know everything about painting? Hardly. Perhaps he did for his time, but there have been new discoveries and inventions since then. We have new paints, new brushes, new canvases.... We don't even use canvases half the time!
As with any field, there is a necessity to specialise. A medical student becomes a surgeon and concentrates on eye surgery. Do you think he's the best person to go to when you have the flue? ... But he has studied medicine. He's an authority on the subject...as it concerns eye surgery.
So it is with art. An art student becomes a painter and concentrates on classical oil paintings. He will not be the best person to edit your photographs.
But you will look at me and say, "Apples and oranges, Dorothy. Apples and oranges." Yes, but no. Just as an oil painter will not know everything about Photoshop, neither will a photo manipulator, a graphic designer, or a digital painter. I am a digital painter, concentrating in Photoshop. I know a lot about brushes, textures, and colour options. But I know next to nothing about Actions, Paths, and Layer Comps. I have only a limited knowledge of the Liquify filter, Channels, and various text options. But these are things that I do not need or rarely use.
But I know they are there. I know they are good for something. So, I peruse tutorials, educational books, and Photoshop's help files. In doing so, not only do I discover the answer to my questions, but I often discover a lot more questions as well as some information that simply is of no use to me at the time. "For real? Assigning Scratch Disks? Who cares?" (I kid. I know the importance of scratch disks....)
The point is, never cease your quest to learn more about your trade. Otherwise, you will be like Raphael--a master of your craft at one time...but the world has moved on and you are an antique.
~D~
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