Click within the table cell you want to edit.

 

Then left click on the <td> tag displayed in the status bar at the bottom of the editor.

 

In the resulting pop up window click the word Properties.

 

Within the resulting Properties window enter the style name into the ID: or/and Class: fields and click OK.

 

Naming the class will after a short delay display the tag as <td.name> in the status bar.

 

These naming concepts also apply to divs and other elements.