Add a Basic Table

Within the editor:

Select the 'Table' icon from the toolbar and choose Insert Table.
Enter the number of Rows and Columns, respectively. The preview window to the right will provide an accurate representation of the table's display.
Width, by default is set at 100%, meaning it will utilize 100% of the content space available on the web page. You can adjust the percentage, or you can set an exact number of pixels. Just be sure to adjust the "%" drop-down option to pixels.

For responsive websites, be sure to use a percentage.

Select the Options tab.
If you want a border, leave Border Width at "1". If you want the structure of a table to organize content, but do not want borders to show, enter "0".
Select Insert.