In V10, in the Presenter's Data Grid wizard, any sources added in step 1 are automatically added to step 2 restrictions - except for parameters. It's unclear how to filter on parameters.
The only alternative now is to filter them as global filters. I'd rather they appeared on the main filter section since global filters are, by default, hidden. It would be nice if they showed up in the main restrictions section just like every other source.
Ideally, we wouldn't have to add parameters at all as sources as they should already be there. The Row Form source wizard automatically includes all of the report's parameters. The Data grid wizard should have the same functionality; they should not need to be added as sources.