By moving the arrow keys left or right the notes are audible and so is an entire chord when marked.
In a piano staff it is possible to mark all the notes vertically, but the audio is only played for one staff at the time even if all notes are marked.
Is there a way to have audio feedback from both staves (the full chord)?
Welcome to the forum, CeeDee. I’m afraid the feature you’re asking for isn’t available at the moment, but it’s something we would like to add in a future version of Dorico.
Ok, thanks Daniel for connecting and clarifying! Now I don’t have to scratch my head anymore 
Looking forward to see this!