When working in a HubSpot website page with the WYSIWYG interface you can set the amount of rows in a table only when the table is created. If it becomes necessary to add rows after the table's creation you'll need to do so through the html editor interface.
You can add a row to an existing table by taking the following steps:
- Edit the module to which you want to add the table
- Select the "HTML" icon in the top right hand corner of your edit screen
- Locate the area in the code where a new row is needed and insert the following code
The above code will insert 1 additional row in your table with 1 section for that row. If you have a table with multiple columns you will need to adjust the number of <td></td> tags in the code snippet. For more information about the structure of tables in html visit: http://www.w3schools.com/html/html_tables.asp