installing a wall register in a soffit-X5

I would like to know how to install a wall register in a soffit. I am doing the as built plan for an existing bathroom and there is a dropped soffit a the heat register. I am using X5. I have done a search for the answer but I am turning up nothing using many different variations on this question. Thank you for any help. I hope I successfully downloaded an image of the existing bathroom.

Sharon
X5
Windows 7
Chief user since V8

Attachment 57106

Just use a wall register, position it in plan view and in an elevation, drag it up. I do it all the time in almost every plan.