I have created a table in Confluence with 10 major categories along the x axis and 6 major categories along they Y axis. I now need a way to segment the 6 major categories along the Y axis, within each one I need to create 5 major sub categories, and then further within each of the new 5 sub categories there will be a set of finite actions, tasks, and discussions that need to be completed. How can I update/segment the already created 6x10 table, so that I have the option to choose one of the 5 major subcategories from a drop down, and then tasks auto change based off the selected sub category?