# NodeBox

Create visual output with Python programming code
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# photobot.Layer.contrast()

## Syntax

    canvas.layers[i].contrast(value=1.0)

## Description

Increases or decreases the contrast in layer i. The given value is a percentage to increase or decrease the image contrast, for example 1.2 means contrast at 120%.

## Example

    photobot = ximport("photobot")
    canvas = photobot.canvas(100,100)
    canvas.layer("robot.jpg")
    canvas.layers[1].contrast(1.5)