Unfortunately we don't offer a tool to insert a table, since we encourage users to create beautiful visual representations of their data by utilizing one of our charts.
If you'd like to create a table manually, you can use lines to build a table using the line tool.
Please note you will not be able to import data into this table - you'll have to insert textboxes and place them into your table accordingly. See #3 in this article for how to insert a textbox. After creating the table, you can also layer your table so it is "behind" your textboxes for easy manipulation of the text.
The lines will appear as horizontal and dashed by default, but you can rotate them to be vertical using the white rotation handler above the line, and change the dashed line to solid using the line tools in the top tool bar when the line is selected.
*PRO TIP* Instead of using the line tool repeatedly, after you have selected and sized one line for your table, you can copy & paste this line to have identical lines for the creation of your table.