Currently the position of the first Tab on a Blank Page or Record Page cannot be changed.
It would be nice if you could make another tab your “Home” Tab by dragging it into the first position / drag the first tab to a different position.
Right now if you want to redesign the Home Tab without touching the live version of said Tab, you have to redesign a new tab and then manually move all Elements of that tab to the home tab manually while also taking care of all old elements on the home tab manually.
Same if you just happen to want an existing Tab as your home tab.