A type of post it would be easier for me, as Ideally it would be nice to show the overall board to a client on the 1 page. main page would therefore include pictures, post it notes, arrows referring to a picture. Also it would be good to be ale to change the size of pictures on the main page so it would all fit in.

We used to have that feature for a previous product which we've decided to put on hold for a while. However, with Board, you can currently add tags and description on the left side of every image.