Via the dataassist wizard, I don't think there is an option to do this, however, you can achieve it by creating a DataAssist Repeating Table
This may give you what you want
In the repeating table wizard, you get to specify the number rows and coulmns you want in your layout
EL: Yes that is what I would like to do, a grid that is 2 columns wide by 30 rows high. I appreciate the tip on the repeating table i'll give that a try.