Joao,
There's currently no way to customize the display of Rise/Drop symbols. This touches on Revit MEP's intention as a design tool and not a drafting tool. As we design features for Revit MEP, we try and ensure that it is capable of conveying designed intent through generally accepted methods.
The design and development task is significantly larger when it includes providing the ability to fully customize the way that we convey design intent, which is really a drafting requirement.
Ultimately our goal is to get to a point where we support the BIM process for all disciplines and stages of an MEP project. This requires that we can do the following:
* Model the required systems for the MEP portion of the project.
* Facilitate the calculations required for the design of those systems; either through native calculations or interface with other applications.
* Coordinate the MEP systems with other disciplines on the project.
* Allow for other applications to leverage the data in the BIM for Upstream and Downstream purposes.
* Construction Documents that convey the designed intent of the MEP systems.
Adding in the requirement for those construction documents to have fully customizable graphical representations of the BIM elements is not a requirement of the above goals, and ultimately slows our progress towards our goal with the product.
That's not to say that we won't provide some of this functionality in the future once we reach our goal.
This is why I asked my original question. We are glad to investigate and try and implement functionality to allow you to convey designed intent, if we currently do not have that ability in the application.
I hope this helps you better understand the answer to your question.
Cheers,
Kyle B
Revit MEP Product Manager
http://inside-the-system.typepad.com/
