diff --git a/README.md b/README.md
index 042714c..2755ee4 100644
--- a/README.md
+++ b/README.md
@@ -35,21 +35,29 @@ Usage
 
 2.  Bind keyboard shortcuts to this script's functions:
 
-        # bind UP and DOWN arrow keys
+        ## Arrow Keys ###########################################
+
+        # OPTION 1: for most systems
         zmodload zsh/terminfo
         bindkey "$terminfo[kcuu1]" history-substring-search-up
         bindkey "$terminfo[kcud1]" history-substring-search-down
 
-        # bind UP and DOWN arrow keys (compatibility fallback
-        # for Ubuntu 12.04, Fedora 21, and MacOSX 10.9 users)
+        # OPTION 2: for iTerm2 running on Apple MacBook laptops
+        zmodload zsh/terminfo
+        bindkey "$terminfo[cuu1]" history-substring-search-up
+        bindkey "$terminfo[cud1]" history-substring-search-down
+
+        # OPTION 3: for Ubuntu 12.04, Fedora 21, and MacOSX 10.9
         bindkey '^[[A' history-substring-search-up
         bindkey '^[[B' history-substring-search-down
 
-        # bind P and N for EMACS mode
+        ## EMACS mode ###########################################
+
         bindkey -M emacs '^P' history-substring-search-up
         bindkey -M emacs '^N' history-substring-search-down
 
-        # bind k and j for VI mode
+        ## VI mode ##############################################
+
         bindkey -M vicmd 'k' history-substring-search-up
         bindkey -M vicmd 'j' history-substring-search-down