Add watermark to all slides of a project

I have a project with multiple slides already created. I would like to add a watermark image in the corner of each slide. I added it to the first slide and I thought when I clicked on the "Apply to All" checkbox on the properties screen for the image that it would propogate to all of the slides. But this does not happen. I selected "apply to all" under the settings button.

How can I add an image to all slides in the exact same spot?