To add a document to one of your contacts in Realm please see steps below:
1. Click on the Documents tab from the REALM menu.
2. Click the New button on the left-hand side.
3. Choose the document you would like to upload from your files and select Upload. Once you've uploaded your document, you'll find it in the Files section of the Documents tab.
4. Click on the document to open it, then select the Share button on the right-hand side. From there, you can choose the contact you want to associate the document with.