This example shows how you can add a single row at the column header row, which is useful for display things like charts that are always on top of data.
By default, Spread.Views shows individual header rows in each column header.
When you set the separateColumn property to false, Spread.Views shows one header row entry instead of individual ones.
In this demo, not having separate columns in the column headers allows the developer to display a chart that is always at the top of the data, even when scrolling.
This can also be extended to other types of data at the top of the grid.