psd ; lect. Basic Tools for Digital Painting

some tips to remember while using it. 
1. replace an eyedropper tool (스포이드=pipet) hotkey with alt, while using a brush.
  - set pen pressure & practice making gradation.

2. use opacity to get gradation while drawing.

3. shift ctrl v for pasting in the exact place.

4. use an eraser for drawing tool, with air brush.

5. paint (g) can also go with opacity. and set area by tolerance. 

5. dodge tool, for brighten and darken the color. 
sponge for stronger saturation or desaturation.
sponge tools can pour more life into drawing skins.

6. use overlay for extra lighter and stronger saturation.

ref: https://www.youtube.com/watch?v=yWY8uwOA0bs