What functionality is missing? What is unsatisfying with the current situation?

Move button "Open in World" in Library at GM Screen to the top beside buttons Edit and Add/Remove from library.  

How does this feature request address the current situation?

  When I have open Library in GM Screen the button 'Open in World' is at the bottom of the article so I must scroll down to be able to open the article in the Wolrd View. I am using GM Screen mostly on smaller or medium screens and when some longer article is open in Library (especially with sidebars) then the preview in the Library is very messy for displaying so I must open it in World View where it is displayed nicely.  

What are other uses for this feature request?

  It is basically only move one button to the top where it is more suitable for quick use. Especially on tablets or medium screens like laptops.