Each workspace cell is based on a KryptonNavigator and so any cell can
be displayed in any of the modes available for the Navigator. Here you can
see the default mode showing each cell with tab headers.
If you want to make each cell a square block with a border all around
you might want to use the Bar - CheckButton - Group - Inside mode.
If you need to present much more detail about the selected page inside
each cell you could try HeaderBar - CheckButton - HeaderGroup.
In some cases you might want to prevent the user from seeing any
indication that pages are involved. Here you see the very simple Group mode.