Save as navigation in photoshop

Hi, I have just bought an imac 27 running Mountain lion. Have loaded photoshop CS6 on it and everything seems fine. However when I come to "Save As" my options are "Desktop" "Documents" etc. I want to either save to a folder on my desktop or to a folder in my documents, but cannot get past these options. I would of thought that clicking on either would expand it so I can see all the folders on desktop or in documents. At the moment I am saving everything to the desktop, then selecting them all and dropping them into the folder that I have created on the desktop...
Thanks in anticipation, Normski

 

Thnx

To quote Homer Simpson " Dohhhhhhhhhhhhh...
I thought the save as was to save as jpeg, dng whatever, and the where meant where you wanted to save it...
Going to take a while getting used to this OS,
Thanks again, Normski