The font-stretch property allows you to
stretch or condense your font. You can asssign it any one of the
following values, from narrowest to widest:
ultra-condensed
extra-condensed
condensed
semi-condensed
normal
semi-expanded
expanded
extra-expanded
ultra-expanded
You can also set it's value to wider
to make it one increment wider than it's inherited value or narrower
to make it one increment narrower than it's inherited value.
Note: This property is unique in that is
it not supported by many browsers yet.
Tip:
This property is optional. If you would like to include it in your
generated CSS code simply check the checkbox by it's name (to enable it)
and then choose a value for it from the font-stretch
dropdown list.
Read
an official description of the font-stretch property from the W3C