Key documentation

[0-wiz-0]

I found

bk/src/view.rs

Lines 80 to 103 in 8d52778

	let text = r#"
	Esc q Quit
	Fn Help
	Tab Table of Contents
	i Progress and Metadata
	PageDown Right Space f l Page Down
	PageUp Left b h Page Up
	d Half Page Down
	u Half Page Up
	Down j Line Down
	Up k Line Up
	Home g Chapter Start
	End G Chapter End
	[ Previous Chapter
	] Next Chapter
	/ Search Forward
	? Search Backward
	n Repeat search forward
	N Repeat search backward
	mx Set mark x
	'x Jump to mark x
	"#;

in the source code, but I didn't find out how to display this help page in bk itself.
What is "Fn"? I had tried 'h' and '?', but I see that these do something else.
Can you please add mention the key to get help in the bk -h output?

Thank you!

[aeosynth]

function keys, eg f1-f12+

from the readme:

Type any function key (eg F1) to see the keybinds.

i suppose this should be in the help output as well