Brush sets
RobinPad brushes come in packs. The factory one is called Environment Brushes and is versatile enough for almost any kind of painting.
You can also create your own packs with the brush creator. Everything is explained in its own section of the handbook.
Any brush can be changed
No brush is fixed. Click any brush in the library and its modifiers open, where you can change any value right away, without stopping to paint.
What you change is remembered. When you want to undo it, the Reset brush override button, at the top right, returns that brush to its original state.
And if you liked a brush but its scatter was too much, you can leave it with the scatter that works for you and keep using it just the same.
The built-in pack
The Environment Brushes pack is the factory one. It is the only one marked as built-in and the only one you cannot delete.
A pack always shows how many brushes it has and, when its author has said so, who they are by.
The selector at the top is not decoration: any pack you create will show up there next to the factory one, and you can switch from one to the other in a click.