The matrix tool shows you a grid comparing your Categories and Descriptors. You can use it to see how many specific actions have appeared, click those numbers to watch the corresponding registers then easily add those registers to a presentation window for example. The data in the matrix can also be saved as a picture or exported into Excel.
A good tip for your matrix is to pre-set its order with the template you use. When editing a template, click the matrix button that shows and drag and drop your rows and columns to set how these should always appear in the timeline and matrix when you use the template.
For more Data matrix tutorials and tips, visit the Matrix article in the Nacsport advanced section of our knowledge base here