help update

share/txt/HELP_CONTENTS

@@ -2,6 +2,7 @@
 · F1 – tree/command-output view
 · F2 – syntax highlighted file contents preview
 · F3/Ctrl-E – command history view
+· F4 – Ctags index (in Emacs format – TAGS file) browser
 · Ctrl-/ – toggle command/execution and search/grep prompts
 · F7 – toggle syntax highlighting
 · Ctrl-T – copy current item to prompt
@@ -11,7 +12,8 @@
 · Shift-Up – go up one dir (·cd ..·) and run ·$NC_DEFAULT_LS_COMMAND·
 · Shift-Down – go back to previous PWD directory
 · Shift-Left/Right – move cursor left/right in the current prompt
-· Ctrl-Shift-Left/Right – move cursor word left/right in prompt
+· Ctrl-Left/Right – move cursor word left/right in prompt
 · Ctrl-X – capture save current screen for later retrieval
 · Ctrl-Shift-Left/Right – retrieve saved previous/next screen
 · F8 – remove the currently shown saved screen from the disk
+. <,> – horizontal scroll left,right