How to add fields (or custom fields) to upload images to Zoho CRM

How to add fields (or custom fields) to upload images to Zoho CRM

Hello,

I am testing Zoho CRM to see how it fits our business processes and one essencial step is to gather documents images in companies and deals modules.
I could find ways to design blueprint and automate the sales pipeline process but I couldn't figure ut how to allow users to upload the images during the required deal stages.
Is it possible?

Regards