Hello,
in the WebReportDesigner it is currently only possible to add a TypeSelector to a StyleRule. (see screenShot: "WRD_StyleRule_Add_Selector.png").
Interestingly, when a report already contains a StyleSelector, it is possible to edit and save the changes, this is great :-), (see screenShot: "WRD_StyleRule_Edit_StyleSelector.png").
Would be great if we could add a StyleSelector ;-).
Best regards
Alexander Schneider