When you build a UDA on the input parameters section there is an option to include a description.  However, by product design this description is not shown when using the UDA in the workflow.  The output description will display, but not the input.

Other than opening up the UDA in design to the look at the inputs, how do people keep there inputs straight when designing a complicated UDA? For example, my UDA has a dozen input values.  Other than making the input parameter a sentence, what other options are there?