I would like to update some data on my rendering parameter template from the rendering toolbar. Like when I click a custom experience button, I could set my vertical alignment field, on the rendering's parameter template.
I understand that the rendering data is stored in xml in the rendering field. And that the parameter data is url encoded in the xml. Just not sure how to update it from a button.
When I try and update it from a customer experience button, the parameters object is readonly in the command arguments.