# The Tools

*Applies to: iOS, iPadOS · Updated 2026-08-13*

Meet Flow's drawing tools — from brush pens to markers and pencils — and customize the style, color, and size of each.

[Original article](https://bonobolabs.com/support/flow/the-tools/)

In Flow, you create a set of drawing tools that can each be customized. You can choose a style, color and size for each tool. With Apple Pencil the tools react to tilt and pressure, which can be customized further in the Drawing and Gestures preferences.

Tools are created and organized in the Tool Dock. When you want to change a tool’s properties like color, tip, or size, this is done in the Tool Editor, which always displays information for the tool you currently have selected. To fine tune how a tool responds as you draw, use the Tool Designer.

The tool types in Flow are:

## Brush pen

[Image: The Brush Pen in Flow]

A brush style pen that applies on top of your existing drawing at full opacity. A highly variable size that can be controlled by pressure with an Apple Pencil makes it ideal for inking large areas.

[Examples using the Brush Pen in the Flow Gallery](/flow/gallery/tag/brush-pen)

## Graphite Pencil

[Image: The Graphite Pencil in Flow]

A technical style pencil with a balanced mix of softness, sharpness and texture. The size is slightly responsive to pressure and can be used for shading at an angle. Applies additively so you can build up strokes or use it for marking-up.

[Examples using the Graphite Pencil in the Flow Gallery](/flow/gallery/tag/graphite-pencil)

## Fineliner Pen

[Image: The Fineliner Pen in Flow]

A smooth, roller style pen that applies at full opacity and builds additively. The size changes minimally with speed and pressure, so it’s ideal for note taking or precise drawing where clean lines are desired.

[Examples using the Fineliner Pen in the Flow Gallery](/flow/gallery/tag/fineliner-pen)

## Fountain Pen

[Image: The Fountain Pen in Flow]

An expressive pen with smooth ink flow and highly variable size depending on speed, pressure and the angle you are holding an Apple Pencil.

[Examples using the Fountain Pen in the Flow Gallery](/flow/gallery/tag/fountain-pen)

## Round Marker

[Image: The Round Marker in Flow]

A round tipped marker. The opacity will build with each individual stroke you make by lifting the Brush or your finger and drawing again.

[Examples using the Round Marker in the Flow Gallery](/flow/gallery/tag/round-marker)

## Chisel Marker

[Image: The Chisel Marker in Flow]

A chisel tipped marker that responds to the angle you are holding an Apple Pencil. The opacity will build with each individual stroke you make as you lift off the screen and draw again.

[Examples using the Chisel Marker in the Flow Gallery](/flow/gallery/tag/chisel-marker)

## Air Brush

[Image: The Air Brush in Flow]

Applies over large areas with additive blending and responds to pressure.

[Examples using the Air Brush in the Flow Gallery](/flow/gallery/tag/airbrush)

## Crayon

[Image: The Crayon in Flow]

A textured drawing tool that creates a rough, waxy mark. The opacity will build with each individual stroke you make as you lift off the screen and draw again.

[Examples using the Crayon in the Flow Gallery](/flow/gallery)

## Flat Brush

[Image: The Flat Brush in Flow]

A wide brush that responds strongly to pressure and fades as you draw. Similar to the Brush Pen, but the tip is flat rather than round and can be rotated, giving a more pronounced faded edge.

[Examples using the Flat Brush in the Flow Gallery](/flow/gallery)

## Lasso Knife

[Image: Lasso tool in Flow]

The [Lasso Knife](/support/flow/lasso/) is a tool that lets you move, rotate or duplicate strokes that you have drawn.

## Erasing

  [Image: Flow's Eraser tool]

The [Eraser tool](/support/flow/eraser/) allows you to erase whole strokes.

## Correction Tool

  [Image: Flow's Correction Tool]

The [Correction tool](/support/flow/correction-tool/) allows you to erase areas of a drawing (like a traditional eraser).

## Ruler

[Image: Ruler tool in Flow]

The [Ruler](/support/flow/creating-with-flow/ruler/) comes in two modes: a simple ruler you drag around the page and draw along, and a drafting ruler for straight lines, rectangles, circles and sophisticated perspective drawings.

## Lines and Shapes

Flow can also tidy up shapes after you draw them. Hold still before lifting and a rough stroke snaps into a perfect line, rectangle, circle, ellipse or triangle. See [Lines and Shapes](/support/flow/creating-with-flow/lines-and-shapes/).