The openness should be conveyed with photos. I would stand in the greatroom/family room and take the photo to include the kitchen and same thing from the dining room.

Close-up on the kitchen

The walk-in pantry should be taken

Both the Master and guest bathrooms should be taken to include its entirety.

photo of the master bedroom should be taken at an angle, possibly from the entrance to the bedroom to include the window(s) openness and bathroom and walk-in closet.

photo of one of the bedrooms from a distance to include a window(s) (I thought I was charged for new blinds, some look warped!)

Backyard to be included! I would again stand next to the fence and take the yard to include the back of the property.