I found the property showButton="true".
Is there some plan from RichFaces team to develop a complete reference guide for RichFaces 4.x, something like EXADEL LIVEDEMO for RichFaces3.x? Because we have to search properties in IDE and to try if it works, there isn't a complete guide explaining all properties.
The problem is that Showcase is not so complete like Exadel Livedemo, with samples + documentation for all properties.
And the documentation from Component Guide doesn't talk about all properties. For example, the property showButton isn't there.