# NodeBox

Create visual output with Python programming code
Home Download Reference Tutorial Library Gallery About

# photobot.Layer.overlay()

## Syntax

    canvas.layers[i].overlay()

## Description

Sets the blend mode of layer i to overlay. Overlaying is a combination of the multiply() command and the screen() command. Light pixels are screened, dark pixels are multiplied.

Overlay works significantly slower than multiply and screen, because it is a blend mode native to PhotoBot and not of the underlying Python Imaging Library.

## Example

    photobot = ximport("photobot")
    canvas = photobot.canvas(100,100)
    canvas.layer("robot.jpg")
    i = canvas.layer("newspaper.jpg")
    canvas.layers[i].overlay()