The Cell Properties dialog box enables you to set the table cells properties.

Checking the Header Cell check box turns the cell into a header cell.

In the Columnspan/Rowspan box, enter the number of cells you want to merge.

Column Width/Row Height controls set the minimal size of the cell when displayed in browser.

Alignment - enables you to align text vertically inside the cell.

Background - enables you to set a background for selected cell(s). Clear the Transparent check box and click on the color rectangle next to it, then select color in the Choose Color dialog box.