Format Menu Button
Click the arrow on the
button to display a format menu from which you can select a new format for the selected cells. Click the button to change the format to the most recently used (from this menu) format.
To create a new format based on the currently selected cells, select New from Selection. The Format Name dialog is displayed, which is used to specify a name for the format.
Afterwards, the new format is added to the format menu.
For more information on formats, see Formats - Overview.