How to make paperclip attachment window open to the File Link Tab instead of Notes tab?

I gave a new computer to a user.  On her old computer when you click the paperclip icon to open the attachment window, it would open to the File Links tab.  Normally this window opens to the Notes tab.  Does anyone know where this option is set?  I don't know where this option is located.  For example on Invoice Inquiry, you click the paperclip icon, go to the File Links tab to find an image of the invoice if using Timberscan.