If you enter 90 in the degrees box in the area of the format cells dialog box, the text will appear vertically and read from bottom to top in the cell.

If you enter 90 in the degrees box in the ORIENTATION area of the format cells dialog box, the text will appear vertically and read from bottom to top in the cell.

This option is in the ALIGNMENT menu.

In this way you change the rotation of the text that you want to show. It is useful for some headers of tables, for example.

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We need more info then that