Update keyboard shortcuts

Keyboard-Shortcuts.md

@@ -1,10 +1,17 @@
 The default keyboard shortcuts are:
 
-* `Up`, `Down`, `Left`, `Right`: Navigation
-* `f`: Full-screen
-* `s`: Show slide notes
-* `o`: Toggle overview
-* `.` (`Period`, `b` or `/`: Turn screen black
-* `Esc`: Escape from full-screen, or toggle overview
+- <kbd>N</kbd>, <kbd>SPACE</kbd>:	Next slide
+- <kbd>P</kbd>: Previous slide
+- <kbd>←</kbd>, <kbd>H</kbd>: Navigate left
+- <kbd>→</kbd>, <kbd>L</kbd>: Navigate right
+- <kbd>↑</kbd>, <kbd>K</kbd>: Navigate up
+- <kbd>↓</kbd>, <kbd>J</kbd>: Navigate down
+- <kbd>Home</kbd>: First slide
+- <kbd>End</kbd>: Last slide
+- <kbd>B</kbd>, <kbd>.</kbd>: Pause (Blackout)
+- <kbd>F</kbd>: Fullscreen
+- <kbd>ESC</kbd>, <kbd>O</kbd>: Slide overview / Escape from full-screen
+- <kbd>S</kbd>: Speaker notes view
+- <kbd>?</kbd>: Show keyboard shortcuts
 
 These can be overridden; see `Readme.md`.