How do I delete a contract/document attached to the Contract tab?

I see the 'download file' and 'read PDF' icons. There is no delete option for the attached contract within the Contracts Tab. How do I attach a contract document in place of the existing?

Once you upload the main document/contract in the Contracts Tab, a copy will also be saved in the Documents Tab. If you need to replace or delete the document which is actively attached to the Contracts Tab, you need to delete from within the Documents Tab.