My company is redesigning one of its accounting software. Intuit's QuickBooks is something that be considered in the same market field, so I took a look at its UI.
Here is the invoice management:
Please take a look at (A) the buttons bar on the top left and (B) the window buttons at on the right bottom.
Which pattern are they following? I guess: - the buttons bar (A) is about secondary actions - the windows buttons (B) are about primary actions.
Moreover, the window buttons are consistent through the different windows, while the buttons bar is contextualized in every single program.