I am very afraid of photoshop; I don't know why. So I started from the basics, like digital coloring, coloring children art, etc, where the basics of Photoshop are discussed and also demonstrated. I was following one tutorial I found useful. There the tutor says 'I use lock transparent pixel for shading'.
This was a time-lapse tutorial. The tutor doing things so fast like a bee! I slowed him down to see what he actually meant, but I saw nothing! I saw some questions here, but they already seem to know what 'locking transparent pixel' is. I don't know.
Please can anyone tell me: 1- What is locking transparent pixel? 2- How do I lock and unlock it? 3- Why people do it during coloring? 4- Why it is needed for shading?
Please use easy words, I dnt wanna quit learning photoshop for 1000th time.