Placing an embedded form button over a photo as shown

I want to show the blue button as shown in the photo as the tag shown in photo. The button is the embedded link of a form on another page. To conclude, I would love the button to float over the photo in a way.

Is there any way to do this?

Hey @stafw,

Just to make sure I get correctly what you are trying to achieve, do you want ti save/favourite the items?