Blending

This family of parameters allows you to overlay colors, images, or text on top of your images. You can control the alignment, width, height, cropping, alpha transparency, padding, size, and position of the overlay image separately from the base image. Blending also gives you multiple blend modes that control the color interactions between the overlay and base images, similar to those in Adobe® Photoshop®.

Blend parameters can be used along with the mark and ~text parameters to overlay multiple layers on a single image.