Recommend including a quick access option to turn on/off the "X"s on the tabs of the books in a window. I have numerous books that I scroll through and regularly hit the "X" accidentally and close the book. Then I have to figure out what book was closed, locate it, and reopen it. Also, I noticed in Logos 10 the text is no longer displayed on the tabs. It is difficult for me to discern which icons represent which book, whereas with the text of the title it was much easier. I recommend giving an option to enable/disable the title.
The uploaded image highlights the "X"s that I am referencing.
