Hey there,
I got frustrated yesterday when I tried to add new "Area Types" to my Color Legend Plan. Revit comes with about 5 or 6 "Area Types" and I couldn't add any new ones in the color legend editor. Every time I tried to add one, it gave me an "imput error". So, after thinking about, and reading through the forums, I think that I figured out what is going on with color fill legends and the way you add new Areas, Uses, Departments or the like......
When doing these, if you want to have total and flexible control over what gets colored, and how to determine the areas, rooms or fields, you first need to create a "schedule" before doing the color fill legend.
The colored key legend plan and schedule can be for either "room" or "area" based. (You can even do both, as different types of color scheme plans.)
I typically used "Area" base plans. This way, I can use the Area Boundary editor to set up all of my keyed areas which may include several rooms, and it calcs the SF based on where I choose to place the purple edit lines vs using "Rooms". (Rooms have set ways that they calculate areas. And, you can't have them be calculated differently in any one plan.)
However, the advantage to using "Rooms" as a basis, is that you can just duplicate any plan, set it up and you're done. Area based plans have to be set up in the "Rooms and Area" browser section so that you have access ot the Area Boundary editor.
Depending on what you want the color legend to look like, you need to decide on whether you are using rooms or areas to determine your colored plan.
Here is the process:
When you start a new color scheme plan, create a Room or Area schedule. (You won't need to place the schedule on a drawing. It is merely created so that you can create the parameters in the Area or Room Family to be used later.) Then, add new fields in the schedule editor. (ie: Area Use, or Department, or Occupancy Type etc). The fields you create in the schedule, will then appear on your Room or Area Family dialog box when editing the Color Legend. (Make sure to select 'room" or "area" in the color legend editor when setting it up) It is there that you can then edit the new field to include all of the uses or departments which get color keyed.
Kind of a backwards approach; however, it's similar to how you add parameters to a door family by adding fields in the Door Schedule.
Thank you goes out to all of the folks who have posted in the past on this matter in other threads. You all helped point me in the right direction.
I Hope this helps you too.
Steve