I would like have parameters be able to be entered into Axis Titles, Legends, etc. so that when I have a parameter that swaps out my measures I can see the parameter value on the axis and in the legend.
This stems from personal experience and forum posts like the following: http://community.tableausoftware.com/thread/124800
I think this would be a fantastic addition to the functionality of parameters.
(Note: Any ideas submitted by Tableau Employees are personal opinions and in no way reflections of the official future plans of Tableau Software.)
-->Community Manager update [Ciara Brennan]
Related idea here: https://community.tableau.com/ideas/8396 Allow Axis Titles, Measure Aliases etc. to use Parameter Values