diff --git a/h-m-m b/h-m-m
index 5454b7a..456af96 100755
--- a/h-m-m
+++ b/h-m-m
@@ -2177,8 +2177,8 @@ function monitor_key_presses(&$mm){
     if ($in=='J')   move_active_node_down($mm);
     if ($in=='K')   move_active_node_up($mm);
 
-    if ($in=='i' || $in=="\n")   insert_node($mm, insert_sibling);
-    if ($in=='I' || $in=="\t")   insert_node($mm, insert_child);
+    if ($in=='o' || $in=="\n")   insert_node($mm, insert_sibling);
+    if ($in=='O' || $in=="\t")   insert_node($mm, insert_child);
 
     if ($in=='e')   edit_node($mm);
     if ($in=='E')   edit_node($mm, true);
diff --git a/readme.md b/readme.md
index 4ab5a34..92f7f35 100644
--- a/readme.md
+++ b/readme.md
@@ -10,8 +10,8 @@
 
 Adding, removing, and editing nodes:
 
-* `i` and `enter` - create a new sibling to the active node
-* `I` and `tab` - create a new child for the active node
+* `o` and `enter` - create a new sibling to the active node
+* `O` and `tab` - create a new child for the active node
 * `y` - yanks (copies) the active node and its descendants
 * `Y` - yanks (copies) the descendants of the active node
 * `d` - deletes (cuts) the active node and its descendants