We all need to lock down our columns. Unfortunately, there is no built in column hold symbol. Today, we will learn how to create a simple parametric column hold symbol and lock it down. The procedure, is quite simple really, create a triangular detail item, and load it into the column family. Copy it 4 times and rotate it so that the two sides that are perpendicular are aligned to the edges of the column. Then create a different visibility instance parameter for each triangle; this will allow you to select which symbol you want to be visible for each column, without having to create a new family for each situation. Follow along with the video below for the complete tutorial.