How do I add a toolbar button to the orders view (small toolbar, not green one)

[mvgucht]

Hey Everyone,

 

I'm creating a module that should export the order data into a certain format.

To do this I would like to add a button in the small toolbar of the order view that will trigger this export.

 

The problem is that I only succeeded in doing so with an override, but I'd prefer to hook in to it or something simillar so that my module won't create an 'already overridden' error when installing.

 

Do any of you guys have an idea on how to do so?

 

WKR

MVG