I just migrated from a Treo 650 to Centro (AT&T). On the Treo, pressing the alt key after the numbers 1,2, or 3 would bring up choices for TRUE fractions (1/4, 1/2, 3/4) and TRUE exponents (1,2,3). I know that these characters are in the character set because I can cut and paste them from memos carried over from my 650. How do I find and type these characters on the Centro? Thanks for any help or suggestions.