-- h, j, k, l, Cursor keys,
- Space, Enter, Backspace - next/previous slide
-- Home - go to first slide
-- End - go to last slide
+- h, j, k, l, Arrow keys,
+ Space, Enter, Backspace,
+ Page Up, Page Down - next/previous slide
+- Home, g - go to first slide
+- End, G - go to last slide