There's nothing in Word that can _set_ the reading level. There is a
tool that's supposed to _measure_ the reading level on the
Flesch-Kincaid scale, although I don't know quite how trustworthy it
is.
In Word 2003 and earlier, go to Tools > Options > Spelling & Grammar;
in Word 2007, go to Office button > Word Options > Proofing. In either
case, check the box for "Show readability statistics".
When you check spelling manually by pressing F7, after the check is
complete you'll see a dialog box with statistics, one of which is the
Flesch-Kincaid Grade Level.
--
Regards,
Jay Freedman
Microsoft Word MVP
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