Zoom in library preview + intuitive navigation in Personal Libraries

Would like a zoom (enlargement) in the library preview. I also find navigating between different 'Personal Libraries' with different content a bit cumbersome. First before -> before -> before, then everything back and forward in the next folder and so on.
At the top of the bar (with the back arrow at the library name) there would be enough room to the right for more open, intuitive navigation.