In a data validation dropdown list, you can't change the font size.
There are a couple of programming workarounds he

http://www.contextures.com/xlDataVal08.html#Font

bras1l wrote:
To see my entire document I have the zoom around 68%.
At this scale, my drop down validation menus are way too small to read
even though I can read all the other normal text.
How can I adjust the scale of the drop down box and its menu without
changing the zoom scale of the entire document?




--
Debra Dalgleish
Excel FAQ, Tips & Book List
http://www.contextures.com/tiptech.html