how to add the financial dimension in the vendor transactions form

hai,

In procurement and sourcing-> common->vendors -> All Vendors

in that every particular vendor click on that Transactions button, the Transactions form is open, in Overview Tab There are Some Columns are there, I want to add the one more Column in that overview tab called Financial Dimension.

in that financial tab Business Unit is the One Financial Dimension ,

i want to add the business unit in to the Overview Tab.

Please help me.