Half of my project will be technically upside down so on that half I want to rotate the entire project while working on that half. Is there a global command for that ? I understand rotating elements etc but not the entire project. Guess I missed something along the way ?
[A] You could rotate pages with contents. Important: that will not rotate the view on a spread but actually rotates pages and all the objects on a page. How? Select the pages you want to rotate in the Pages panel, switch to the Page tool and use the Transform panel to set rotation angle and reference point.
Rotate the page and its contents back when done.
[B] You could rotate the view on a spread.
Select the spreads you want to rotate the view with in the Pages panel.
Go to options: Page Attributes > Rotate Spread View >
Do "Clear Rotation" with Rotate Spread View when done.