Are you using a windows PC for an Apple ?
What software are you running to control the BeoPort?
[ I am not sure there is a direct, immediate button to get what you want; I use LinkPlayer on my Apple which allows me to scroll to select Photo to access the iPhoto library ]
First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*