If you want to desaturate an image in Illustrator, there are a few different ways to go about it. One way is to use the Hue/Saturation tool. To do this, first select the image you want to desaturate and then click on the Hue/Saturation tool (it looks like a color wheel). Next, click on the light blue circle in the middle of the tool and drag it towards the red circle until the desired level of desaturation is reached. ..