Hi,
An easy way to do this is to generate your table shortcode using the Swift Framework shortcode generator, view the page where this is output and then copy the actual table HTML back into the text editor “Text” view tab replacing the shortcode.
You can then edit the table code and add your own classes:
<table class="sf-table striped_minimal"><tbody>
<tr>
<th>HEAD COL 1</th>
<th>HEAD COL 2</th>
<th>HEAD COL 3</th>
</tr>
<tr>
<td>ROW 1 COL 1</td>
<td>ROW 1 COL 2</td>
<td>ROW 1 COL 3</td>
</tr>
<tr>
<td>ROW 2 COL 1</td>
<td>ROW 2 COL 2</td>
<td>ROW 2 COL 3</td>
</tr>
<tr>
<td>ROW 3 COL 1</td>
<td>ROW 3 COL 2</td>
<td>ROW 3 COL 3</td>
</tr>
</tbody></table>
Would result in: