I was wondering if Dynamo can wipe out the Type Mark value on Doors that are NOT placed on a wall but reside in the project browser list under families.
I do realize Dynamo can wipe the Type Mark if the door is placed in the model.
You’d first have to get all doors in the project, then get their types, then get all doors in your project (so also the unplaced ones), then you can filter out all the types that are not placed in your project and set those typemarks to “” like shown by @Kai