Before you remove a linked file, make sure you have a backup of the original file. This process cannot be undone.
To remove a linked file from the File Attachments field:
Open the reference for editing.
Scroll to the File Attachments field and highlight the file icon you wish to remove.
Note: You can hold your mouse pointer over the file icon in the File Attachments field to display the path and filename of the linked file.
From the Edit menu, select Clear.
If the file was linked with an absolute path, the File Attachments field no longer points to the file. The original file remains intact.
If the file was linked with a relative path, that file is deleted from the library’s DATA\PDF folder, and the File Attachments field no longer points to it. You will not be able to reinsert the link unless you have the original file stored elsewhere on your computer.