If you right click on any data in the left column of a heat map, you'll find a menu of extra things you can do with the data. For example, you can "copy selection" and then paste the raw data into an Excel document. If you want to do this at a higher level, try "Drill up". If you want to exclude a particular area, right click that area and "Exclude" (or use "Include" if you only want to show that one area). These features may be quicker than filtering and exporting the data. If you have a top tip that may be useful for others, do let us know!