The Table Wizard is a plugin, available from the Tools menu. It aids in quickly creating customized table. The wizard can also import data from a variety of data sources and formats.
The first step, Table Data Source, lets you specify whether you'd like to import data from a source such as the selected text in the current open document, the clipboard, or from a file. If you chose to import data from a source, the next step in the wizard is Table Data Format.
The next step is the Table Setup. In this step, you specify the number of rows and columns in the table. You can click on a cell in the table preview to highlight it and then set its ROWSPAN and COLSPAN attributes. Pressing the Next button proceeds to the Table Attributes step.