If you need to attach multiple columns or walls to a roof, you can attach those elements quickly & easily using "Attach Top/Base". This short video clip shows how to attach columns to a roof using "Attach Top/Base". https://youtu.be/tOeX4sDgJJ8
Author: DONGSOO
Dongsoo is not only a BIM specialist who has extensive knowledge and wide experience in the architectural field, but also a freelance writer and BIM instructor.
Dimensioning between circles in Revit (Center Mark Visible)
You can place a dimension between circles using the parameter called "Center Mark Visible" because you cannot snap center points of circles. http://www.youtube.com/watch?v=tgaFp_tVnKg