Using+the+brush+tool

Using the brush tool
Hold down pencil tool by left clicking and chose brush tool Options menu appears across the top. Chose thickness of brush and soft or hard - soft brush is darker in the middle Hard brushes like a pencil

Mode normal, opacity 100 flow 100 Select a colour on bottom left

Decrease flow to 10% then if you draw over the top it gets darker

Selecting more brushes
Windows - brushes (F5) Click on arrow on top right of small screen eg assorted brushes - replace brushes with assorted brushes You can create your own brushes too