Is this a standard Revit schedule?
Revit does not allow for graphics to be included in a schedule. This has been on the wish list but has not been included as of yet. Revit does allow for special characters to be used. Special characters can be used as long as the character is of the same font style as the font defined in the body font style of the schedule. One example of the use of special characters would be to create a ‘dot matrix’ type of schedule where you want to show a special character as the dot.
Learn how to create this type of schedule plus many other scheduling tips in my AU session.
AB1712 - Schedules: Beyond the Basics
See you in Vegas!