Datasources can be added to your Datagrid for use in chart visualisations by selecting, 'Datasource Column,' from the the, 'Add Column,' selector.
This opens the, 'Find Datasource,' modal.
Adding your chosen DataSources to the DataGrid
The Datasource list can be filtered by name, kind, tag, quantity and site. DataSources can be added to the DataGrid by clicking anywhere on the row, which adds it in the background to the grid. The same Datasource can be added multiple times to the grid, with this number noted in the 'Usage,' column.