In order to change any of the properties set up in the Graph Editor press the Graph button in the Edit area of the Design section on the ribbon and the Graph Editor will open.
Note: The graph scale that draws on the header area of the column needs a box of its own. In order to achieve that in the Depth columns window (form-box) set a column header e.g. Depth (m) and add a sub-column with no header on it.
Note: If this sub-column does not exist then the graph scale will take over the column header space and no header will display.
It is possible to add a second (or as many as required) dataset into the same graph.
When you have more than one series, then a legend must be added for each item.