Reading mode. Hide the menu bar.

[성준5FE2]

Until a week ago, only pages appeared in the read mode, but suddenly a menu bar appears at the top of the read mode. I want to know how to get rid of it.

[ls_rbls]

Based on your screenshot, you've already have the correct view for Reading Modenwithout the File Menu bar and navigation panes. But it seems like after an update the "Home" , "Tools" and "Documents" default toolbar remains visible. 

Personally I've never payed close attention to this detail before  until now that I saw your inquiry, so I thought you were confusing Reading Mode with Full Screen Mode, but same problem here.

However, when I went to check "Document Properties" I couldn't help but notice the note bordered in red in my slide below: