New convert from Windows so right now fighting through all the non-intuitive crap. I notice when in an application, when I go to open a file, it will automatically take me to a folder (I guess that is "finder"?), like the one that contains the file I used last. How do I navigate UP in the directory hierarchy? In windows explorer/apps there is either a button with an up arrow in it or you can see your whole path so you can click to whatever part of the hierarchy you want to view. Are folder hierarchies irrelevant in MACs? What is the purpose of hiding where you are?