Shift on B&O remotes is a lot like Shift on the PC keyboard - it opens up a lot of secondary features. On the Beolink 1000, for example, I found out by chance that Shift+A.Tape will turn on the second Tape input on my Beocentre 8500, and it's very similar on the Beo4 - uncommon controls are accessed by Shift instead of being given their own button.
Have a look in the Manuals section on here - if you're a bronze member, pay the extra and upgrade, imho it's well worth it for the manuals alone, let alone the prize drawer and so on!!
Good luck,
Alex
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Beowulf - the Original music aficionado...?