Hi Jose,

You can create the grey box by using a "title begin" and "title end" parameter.
Under the Snippets these can be found in DIS > Protocol > Param > Displayed.
Every parameter that you want to display in 1 grey box should be surrounded by a "title begin" and where the grey box ends, you should put a "title end" parameter.
If you want multiple boxes: you should create a new "title begin" param for each box, but you can reuse the same "title end" every time.
See the attached screenshot below, parameter 100 is a "title begin" param, while parameter 101 is a "title end" param.

More information can be found here: https://docs.dataminer.services/develop/devguide/Connector/UIComponentsGroupBox.html

Regarding your second question:
You can put multiple buttons on 1 row by defining multiple discreet values on 1 button parameter.
See the second point on this documentation page: https://docs.dataminer.services/develop/devguide/Connector/UIComponentsButton.html

Hope this helps!

Kind regards,