How can I access the Quote Order Wizard form for customization?

I need to add a calculated field for extended price in the “Lines” grid on the Quote Order Wizard. Can’t seem to find a way to access that form since it is modal, I can’t click on “Customization” when it is displayed. Suggestions? Thanks!

Did you try to right-click the screen (not on an object)?

I would never have thought about that! Is that documented anywhere? Thank you!

Random luck instead of documentation.