You can change the settings in the Custom Form Styles page, lab75.
Let me show you how:
You can also check this article for more details on how to customize form templates.
However, if you are referring to the transaction page, changes will only take effect to the same transaction.
The Community is around to help you if you have other concerns. Have a good one!
HI: Yes i was referring to the transaction column widths, not the invoices themselves.
Thanks for your help though.