Click the Table Numbering button in the Tools section in the lower-left. The icon appears as a number 6.
Once selected, click and hold the mouse on the diagram to begin numbering.
While holding the mouse button, trace out a path over the tables you want to number, and the numbers will follow in that order.
We've provided an easy option to remove the numbers 4 or 13 to accommodate certain preferences.
Here's a short video tutorial that includes further instructions on Table Numbering!