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I am using Liferay 7.4 CMS only, and I have created one Object Employee with a field named "Doc" with type as "Attachment" for storing Image, and I also have other fields as well like text, etc.
Now I want to display entries of this object in a Page using collection Provider, So when I use collection provide I can see an option for binding my all fields with elements like - the "text" field with "heading", but I want to display an image in my page using collection provider, but I am not getting any field to bind my "attachment" field of Object for an Page.

For reference: https://learn.liferay.com/w/dxp/building-applications/objects/displaying-object-entries
In this Above link, we are using the collection to display items of our Object, and then we bind those fields with our Object right. 
But I am not able to see any option to map the Image field with our Object's Image field.

Thank you in advance.