How to manually adjust portal page width

[okh310]

I have a portal tab with two columns.  Column 1) Cognos Viewer pointing to a report and Column 2) Multi page dashboard.  (SEE ATTACHMENT)

The Cognos Viewer contains a prompt page used to communicate with the multi page dashboard.  I need it to be very small.  like say 10% of the page.  Cognos only allows you to go as low as 20% in the width but that is too big and is not efficient.

How do I manually adjust this?  Also, is there an option to drage the column to the left to completely minimize the first "column" of portal page?