Hi - As you can see on the graph I have Customer category where one of them is (no value). (no value) comes from another source linked to the graph (Media Spend). I would like to be able to select individual Customers only (Boots, Lloyds etc). When I do this (no value) un-ticks automatically which makes the stack bar disappear. Is it possible to have (no value) constantly selected? Then I could just hide it and the client could manipulate with relevant categories only. - Thanks