How to decrease the width ofthe result box of a value prompt in cognos 10

Hi,
I need help to decrease the width of the result box of a value prompt in cognos 10.
My ie version is 10.

The box is big since the data that is fetched from the db is very long and hence the result box is also very big.
I need to resize the width so that when I hover I shld be able to see the text.

Properties - Size & Overflow