The brush

The brush is the tool you will use for almost everything. At the top you have its modifiers: controls that change how the stroke comes out.

Brush modifiers

When you pick the Brush tool, its modifiers appear at the top center.

If RobinPad detects a touch screen, size, opacity and Flow move into a vertical column so you can handle them with your fingers. You can turn this off in Settings › Interface.

Brush size

Changes the brush size. Drag left or right to make it smaller or bigger. The range goes from 0.5 px to 1000 px.

You can also change it with the Alt + Shift shortcut: hold both keys down and drag the pencil up and down.

Brush opacity

Drag left and right to reduce or increase the transparency of the brush.

Flow

Flow decides how much color builds up when you go over the same area again. With high Flow, the stroke comes out crisp on the first pass. With low Flow, the color builds up little by little and you can make smooth transitions without the color running away.

One detail: Flow is temporary. If you switch brushes or reload the page, it goes back to the value the brush comes with. Size and opacity, on the other hand, are remembered.

Line Smooth

It works through preset levels: off, low, medium and high. On screen they show in English, as Off, Low, Medium and High.

With smoothing on, the stroke comes out less irregular and lines and curves look cleaner.

Size by pressure

When you turn it on, pen pressure makes the brush bigger. When you turn it off, the pencil paints at the fixed size you have set.

Opacity by pressure

Pen pressure takes over the opacity: more pressure, more opacity; less pressure, less opacity.

Dirty brush

It is a brush that leaves bits of color on the tip, like the brushes you use with real paint. It has its own page with all its settings.

Keep strokes inside

This option makes new strokes stay inside what you have already painted, instead of spreading onto the empty areas. It is the quickest way to keep an area you were detailing clean.