In Step with InDesign: Adding background colors with blending modes
Written by Jamie Chambers
Like Photoshop, InDesign has many Layer blending modes to quickly create a special effect. Changing a layer from the Normal blending mode setting to a different blending mode changes the way the layer blends with the layer or layers below it. Fifteen modes are found on the Layers palette in InDesign.
1. Open a new document with two layers. On the bottom layer (layer 1), place an image of a background texture such as wrinkled paper.
2. On the top layer (layer 2), place an image. To get the best result, use a black and white image.
3. With the image on the top layer selected, go to the Effects palette. Change the blending mode from Normal to Multiply. (You can also change the blending mode in the Transparency area of the Effects dialog box.)
Try different images and various background textures to create many new images.