We know the basic form of an html table
<table> <tr> <td>contents</td> </tr> </table>
This is a table with one row and one cell.
You can type this by hand, adding <tr> for new rows, and <td> for new cells. You can format by setting the height and width options.
Dreamweaver can do some of the typing for you.
To create a table select "insert table". There are a bunch of options for your table which are all sort of self explanatory. how many rows, how many columns, cell padding, and so on.