Table headings are a great way to work with containers in Map view – it’s like having the columns from Outline view available on your maps.
The best way to set up table headings is to use the Summary Table Properties popover – click the little “table” icon next to a container to open the popover.
@mwra has several articles about using table headings and table expressions (the engine behind what the tables display) in aTbRef – here’s an article that’s a good starting point to explore this Tinderbox feature.