Make sure you have an open project, and the click on the 'New Table' icon on the tool bar, or from the Tables menu, select New Table.

Select the table by clicking on it in the Project Browser (if it is not already highlighted) and click on its name or press F2. A cursor will appear allowing you to rename the table.

Select the table by clicking on it in the Project Browser and press the Delete button.

Click with the mouse on any property and press F1 to obtain help about its function.