Limit characters in a report

Yes, it's possible. This would be the code for a task report:

-----------

valueexpression=CONCAT(LEFT({project}.{description},100),"...")

valueformat=HTML

displayname=Project Description

-----------

You can omit the CONCAT() portion if you choose, so it would just be valueexpression=LEFT({description},100). The CONCAT is just there to add "..." to the end of the description, that way a user knows that there may be more text that they're just not seeing in the report.

If you want to get REALLY fancy and only add the "..." when the description is > 100 characters, you'd use this formula:

-----------

valueexpression=IF(LEN({project}.{description})>100,CONCAT(LEFT({project}.{description},100),"..."),LEFT({project}.{description},100))

valueformat=HTML

displayname=Project Description