Brush is a freehand painting tool.
- Open an image to your choice or create a new one.
- Activate the Brush Tool.
- In the Options bar, define brush tip size.
- Choose a color.
- In the Brush Preset picker, adjust the brush hardness - either increase it for sharp-edged strokes or soften it for gradual color transitions.
- There are some more controls for the Brush Tool in the Options bar. For example, you can reduce the "Opacity" value. Now the Brush paints with transparent strokes allowing seeing the previous content.
Tip. Just in case you didn't know, the Brush tool is also available in Photoshop Elements that is way cheaper version. And if you believe, Photoshop Elements lacks some other important feature, be sure to visit this page.