We need to insert an line between my YOY comparative analysis to differentiate .We have used single logic.
Below is the image for reference which we required exactly.
As far as I know there is no inbuilt feature availible to change this in the properties.
I suppose you will have to create a vertical lineobject and place it on toplayer to the correct position.
Hope that helps!
its a bit clunky but I have done this by adding a new field expression into the chart which has no content ( enter '' as the expression) then use the format background for this expression to set the colour and then minimise the size of the column in the table - only works with Straight Tables