You can add a table by using the Text Element. 

1. Click and drag in your Text Element

2. Double click in your Text Element, and select the Table icon

3. A popup window will appear where you can select your Table Settings

4. Once set, your tablet will appear. 

5. If you need to make any changes to your Table, right click and choose from the available options.

(You need to be double clicked and editing the Table to get the options.)

For example, to add more cells: Right Click and choose Cell > Insert Cell After