'Row' Headers in a Grid View ? [Dashboard Component]

Hello,

There is this grid view property that has been bugging me for a while called 'Show Row Headers'. Using VB.Net, we cannot define 'Headers' for the rows of a DataTable object, so I'm curious to know how to use this property to the fullest ?

By switching it to 'False', the only noticeable difference is this little blue arrow that disappears:

I assume that we can have a CubeView-like formatting with Row & Column headers using the grid view, but I can't seem to enable it.

Thanks for your help.