How to rotate the tap tool effect?

I have a vertical bar chart with lots of groups representing hours worked on a project. They have data for each week. The hours are on the y axis and the week number is the x axis. I would like the to use the tap tool to highlight that specific project over all the weeks. However, when I set it up it highlights all the projects in the same week instead, I would like to rotate that capability. Please let me know if this doesn’t make sense. If need be, I can provide a screenshot or two if needed.