Other dynamics determine how paint changes over the course of a stroke.

Opacity Jitter and Control

Specifies how the opacity of paint varies in a brush stroke, up to (but not exceeding) the opacity value specified in the options bar. To specify a percentage by which the opacity of the paint can vary, type a number or use the slider to enter a value. To specify how you want to control the opacity variance of brush marks, choose an option from the Control pop‑up menu:

Off

Specifies no control over the opacity variance of brush marks.

Fade

Fades the opacity of paint from the opacity value in the options bar to 0, in the specified number of steps.

Pen Pressure, Pen Tilt, Stylus Wheel

Varies the opacity of paint based on the pen pressure, pen tilt, or the position of the pen thumbwheel.

Flow Jitter and Control

Specifies how the flow of paint varies in a brush stroke, up to (but not exceeding) the flow value specified in the options bar.

To specify a percentage by which the flow of the paint can vary, type a number or use the slider to enter a value. To specify how you want to control the flow variance of brush marks, choose an option from the Control pop‑up menu:

Off

Specifies no control over the flow variance of brush marks.

Fade

Fades the flow of paint from the flow value in the options bar to 0 in the specified number of steps.

Pen Pressure, Pen Tilt, Stylus Wheel

Varies the flow of paint based on the pen pressure, pen tilt, or position of the pen thumbwheel.