Click and drag over all the cells that you want to combine.
Click the Tables and Borders button on the Standard toolbar to open the Tables and Borders toolbar.
Click the Merge Cells button on the Tables and Borders toolbar.
PowerPoint merges the cells.
You can merge two or more cells in a PowerPoint table to create one cell. This technique is commonly used to create a title cell that appears at the top of the table. You can also merge cells to combine a list of data or create a larger table cell to insert a picture, for example.
What Happens to Existing Text ?
If you apply the Merge Cells command to table cells that already contain text, PowerPoint merges the cells and lists the data from each on a separate line within the new cell.