Disable Pinning on Certain Images?

Hello,

When I click on the Pin button within a post, it opens a window of pinnable images including my logo, smaller images, and my call to action which is an image. None of these are relevant for pinning.

Is there a way that I can select which images in my post can be pinned through your share button? Can I add some custom CSS and then give certain images a “no pin” class or something?

I’m a newbie, so the more detail the better. Thank you for your time.