Click What's This?
in the Standard toolbar or select Help > What's This?
(you can also press Shift+F1).
The cursor takes on the shape of the What's
This? icon.
Point to an icon, then click the icon.
This displays a long help message in a box:
Important:
In some
cases, What's This? gives you help on dialog boxes. To
do so, just click the
icon in the top right corner of the dialog box then point to the
desired area to display the long help message.