How do I get the Title column of my SharePoint Online doc library to show the title of PDF documents?

I have a simple document library on my department's SharePoint Online site. I've uploaded a mix of Word documents and PDF documents to it. I want to show the title of each document. I've worked out how to make a title column appear (I'm a SharePoint novice so that in itself was an achievement!). SharePoint automatically fills in the title column for the Word documents with the title I entered in the title metadata box in Word's save dialog. However SharePoint doesn't seem to do the same for the PDF files. I am pretty sure the title metadata is in the PDF file - I filled in that field when I did the Save As PDF and I also verified the title field was there using the Evermap AutoMetadata metadata reader utility - but SharePoint doesn't seem to pick up on it.

Why? Is there something I can do to fix this? In your replies, please remember that I'm a SharePoint novice and not quick on the uptake when it comes to software.

I'm using SharePoint Online, through an Office 365 subscription (though I am using a local Word 2010 installation, NOT the Word within Office 365).

Regards,

Bruce Officer