Can anyone tell me how I can get the gear icon to display at the top of each Book page that lets users print the book or the current chapter? I see that in screen captures of other people's books but I don't see it in ours. we are running Moodle 3.5.2.
It will depend on your theme Mia.
The Gear icon will show at the top of the book in the Boost theme. It may not display the same icon or in the same place in other themes though. You should be able to find the link to print the book in the administration block in other themes though.