Gridmarket Header & Navigation wrapper related

Hi

My last two posts remained unanswered...hoping to get some advice this time....:slight_smile:

I have two requests here....

1) FrameMarket/GridMarket theme has two parts within Branding-Wrapper.....that created space for Logo & Ad and Site-Wrapper......space for Content & Sidebar. Is it possible to split the header & navigation-wrappers also so that the empty (left-out) spaces can be utilized...if yes then where (which file) can it be done?

2) is there any plugging like Global Footer Content for header also....so that it can also be fixed site-wide?

Thanks