When the Rectangle List
toolbar button is pressed, a dialog appears
which looks like this:

The list shows all the rectangles on the current side of the badge, along with their types, location and size.
If a rectangle was selected on the badge prior to pressing the Rectangle List toolbar button, then this rectangle will be selected in the list, otherwise the first rectangle will be selected.
The rectangle currently selected in the list will be selected on the badge when the Close button is pressed.
When the Edit Rectangle button is pressed, the Rectangle Parameters dialog will open for the rectangle currently selected. For more information on the Rectangle Parameters dialog please see Rectangle Parameters.