Grrr... this building malarky is driving me nuts! I'm making a castle entrance and have got everything snapped into place EXCEPT one arch support! It just won't go and I've been trying for ages!
Please can someone tell me how to get it into place? The one on the other side went in nicely, but this is the closest I can get the right hand one to go...
I have tried 'add to building', I have tried the ctrl key, neither of those will get it into place.
Please can someone tell me how to get it into place? The one on the other side went in nicely, but this is the closest I can get the right hand one to go...

I have tried 'add to building', I have tried the ctrl key, neither of those will get it into place.