#679: Add \overarc and \overleftrightarrow

docs/Api_Methods.md

diff --git a/docs/Api_Methods.md b/docs/Api_Methods.md
index b7db00c..a776774 100644
--- a/docs/Api_Methods.md
+++ b/docs/Api_Methods.md
@@ -190,7 +190,7 @@
 
 Move the cursor to the left/right end of the editable field, respectively. These are shorthand for [`.moveToDirEnd(L/R)`](#movetodirenddirection), respectively.
 
-## .movetoDirEnd(direction)
+## .moveToDirEnd(direction)
 
 Moves the cursor to the end of the mathfield in the direction specified. The direction can be one of `MQ.L` or `MQ.R`. These are constants, where `MQ.L === -MQ.R` and vice versa. This function may be easier to use than [moveToLeftEnd or moveToRightEnd](#movetoleftend-movetorightend) if used in the [`moveOutOf` handler](Config.md#outof-handlers).
 

src/commands/math/commands.js

diff --git a/src/commands/math/commands.js b/src/commands/math/commands.js
index 2e6fe5d..68838bb 100644
--- a/src/commands/math/commands.js
+++ b/src/commands/math/commands.js
@@ -330,6 +330,15 @@
     this.sup.downOutOf = insLeftOfMeUnlessAtEnd;
     super_.finalizeTree.call(this);
   };
+  _.reflow = function() {
+     var $block = this.jQ;//mq-supsub
+
+     var h = $block.prev().innerHeight() ;
+     h *= 0.6 ;
+
+     $block.css( 'vertical-align',  h + 'px' ) ;
+
+  } ;
 });
 
 var SummationNotation = P(MathCommand, function(_, super_) {