I assume they are trying to enable Reader mode which is Ctrl+Alt+R

F9 on Windows

Ctrl + Alt + R on Linux

Command + Option + R on macOS

(It uses JS to only show the one for your platform but with view source you can see it mentions all three of these different OSes.)

So I guess the first guy is a Windows user and you other two use Linux.

	▲	Liquid_Fire 4 hours ago \| parent [-]
		> (It uses JS to only show the one for your platform but with view source you can see it mentions all three of these different OSes.) There is a dropdown at the top-right to select the platform - no need to view source.

nbernard 6 hours ago | parent | prev [-]

Probably. When available, reader mode can also be activated by clicking the little "page with text" icon on the right of the address bar.