How do i let down the draw bridge?

[LordFess]

I found the key to the draw bridge but can't find where to use it to let the
bridge down....can give me directions where to let it down please?

[CraigBee]

When you see the text pop up that says 'lock' or 'drawbridge' or something like that, press <shift>, just like how you open doors and it will automatically use the key to raise the bridge if you have the key.

[Cathail]

The lock for the bridge is on one of the posts of the bridge itself, right side if facing the bridge from the stairs.