Get the specific field value in dropdown of link field

Hello community,

I have created one link field of relation Doc field.
When I am trying to select the field name of the doc field, it gives me binary/hash value for the specific doc.

I want to display the original label of that field.

I am sharing screen shot for that.

Thank You.

Link field gives you the name of a document.
Here, you can change you naming series of your document. Check Naming section in your doctype.