Adding a new column header row
If you need to add more text or more space in the header area, you can add multiple column header rows. Figure 2-27 shows a row with text added above the default column header row.
Figure 2-27  
When you insert a row, the new row contains the same number of columns as the other rows in the table. To display text that spans multiple columns, as shown in Figure 2-27, you must first merge the columns in that row. As Figure 2-27 shows, you also can add borders to a row.

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