You can click the "print" button in the upper right hand corner, which gives you...

rkangel · on Feb 17, 2017

Ah - those icons are quite small and subtle. I hadn't noticed them.

Also, while the top right one has a tooltip, the two top left ones don't so you have to click to find out what they do. Always a risky move!

dbaupp · on Feb 17, 2017

For some reason that page has the title "Macros - The Rust Programming Language"

steveklabnik · on Feb 17, 2017

Weird, I'll file a bug, thanks.