From the Autodesk App Store:
The Amplify Type Keynote Preview plug-in allows users to override the color of Element, Material and User Keynotes in Autodesk® Revit®. Simply choose a color based on type, and all keynotes in the active view will be overridden. To return the Keynotes back to their original state, just select the Keynote Type Preview again. This is a quick and easy way to ensure the correct keynote types are being used on your project.
[youtube…
Read more