Convert RGB/CMYK images to Grayscale
Script for InDesign and Photoshop CS3-5.
Opens all RGB/CMYK images from the active InDesign document in Photoshop and converts them to Grayscale.
Warning: this script permanently and irreversibly overwrites the original CMYK or RGB image with a grayscale version, losing possibly irreplaceable information. So be careful!
Click here to download.