How do convert part of a treble staff to a grand staff for a few bars for a two handed song ending?

Dorico
1

I was able to do this function in finale for some time now but I have yet to find the way in Dorico 3.
Is this possible? If not is there a special way of importing an uncompressed MusicXML 3 file from Finale 26 to do it?
Thank you.

2

Right-click an item on the existing staff, then go Staff > Add Staff Below (or above). Use the Bracketing tool in the left panel of Engrave mode to bracket or brace it as you wish.

3

Thank you for your quick reply Pianoleo. That took care of it perfectly.