Some thoughts ..

To change the default font *size*,
we could try this (It's a windows setting)

Right-click on any empty space in the desktop choose Properties

Select Appearance tab Advanced button
(in Win XP)

In the Advanced Appearance dialog:
Click on "Item" dropdown menu choose Tooltip
Choose a (larger) font size OK Apply

To change font *type* and formatting (eg: bold),
try Debra's page at:
http://www.contextures.on.ca/xlcomments03.html
(Scroll down & look for the section: "Insert a Formatted Comment")
--
Max
Singapore
http://savefile.com/projects/236895
xdemechanik
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"Miri" wrote:
.. sorry, but your solution is not setting the comment font.
only the regular font. do you know other way? (i have excel 2003)