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).
 
diff --git a/src/commands/math/commands.js b/src/commands/math/commands.js
index 53fb861..68838bb 100644
--- a/src/commands/math/commands.js
+++ b/src/commands/math/commands.js
@@ -81,6 +81,8 @@
 LatexCmds.overline = LatexCmds.bar = bind(Style, '\\overline', 'span', 'class="mq-non-leaf mq-overline"');
 LatexCmds.overrightarrow = bind(Style, '\\overrightarrow', 'span', 'class="mq-non-leaf mq-overarrow mq-arrow-right"');
 LatexCmds.overleftarrow = bind(Style, '\\overleftarrow', 'span', 'class="mq-non-leaf mq-overarrow mq-arrow-left"');
+LatexCmds.overleftrightarrow = bind(Style, '\\overleftrightarrow', 'span', 'class="mq-non-leaf mq-overarrow mq-arrow-both"');
+LatexCmds.overarc = bind(Style, '\\overarc', 'span', 'class="mq-non-leaf mq-overarc"');
 LatexCmds.dot = P(MathCommand, function(_, super_) {
     _.init = function() {
         super_.init.call(this, '\\dot', '<span class="mq-non-leaf"><span class="mq-dot-recurring-inner">'
@@ -328,6 +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_) {
diff --git a/src/css/math.less b/src/css/math.less
index bff1201..dfa53e2 100644
--- a/src/css/math.less
+++ b/src/css/math.less
@@ -350,10 +350,24 @@
     font-family: @symbola;
   }
 
+  .mq-overarc {
+    border-top: 1px solid black;
+    -webkit-border-top-right-radius: 50% .3em;
+    -moz-border-radius-topright: 50% .3em;
+    border-top-right-radius: 50% .3em;
+    -webkit-border-top-left-radius: 50% .3em;
+    -moz-border-radius-topleft: 50% .3em;
+    border-top-left-radius: 50% .3em;
+    margin-top: 1px;
+    padding-top: 0.15em;
+  }
+
   .mq-overarrow {
+    min-width: .5em;
     border-top: 1px solid black;
     margin-top: 1px;
     padding-top: 0.2em;
+    text-align: center;
 
     &:before {
       display: block;
@@ -372,5 +386,34 @@
       filter: FlipH;
       -ms-filter: "FlipH";
     }
+    &.mq-arrow-both {
+      vertical-align: text-bottom;
+
+      &.mq-empty {
+        min-height: 1.23em;
+
+        &:after {
+          top: -0.34em;
+        }
+      }
+      &:before{
+        -moz-transform: scaleX(-1);
+        -o-transform: scaleX(-1);
+        -webkit-transform: scaleX(-1);
+        transform: scaleX(-1);
+        filter: FlipH;
+        -ms-filter: "FlipH";
+      }
+      &:after {
+        display: block;
+        position: relative;
+        top: -2.3em;
+        font-size: 0.5em;
+        line-height: 0em;
+        content: '\27A4';
+        visibility: visible; //must override .mq-editable-field.mq-empty:after
+        text-align: right;
+      }
+    }
   }
 }
diff --git a/src/services/keystroke.js b/src/services/keystroke.js
index fc3fc8e..a53cb5a 100644
--- a/src/services/keystroke.js
+++ b/src/services/keystroke.js
@@ -241,11 +241,15 @@
   _.ctrlDeleteDir = function(dir) {
     prayDirection(dir);
     var cursor = this.cursor;
-    if (!cursor[L] || cursor.selection) return this.deleteDir();
+    if (!cursor[dir] || cursor.selection) return this.deleteDir(dir);
 
     this.notify('edit');
-    Fragment(cursor.parent.ends[L], cursor[L]).remove();
-    cursor.insAtDirEnd(L, cursor.parent);
+    if (dir === L) {
+      Fragment(cursor.parent.ends[L], cursor[L]).remove();
+    } else {
+      Fragment(cursor[R], cursor.parent.ends[R]).remove();
+    };
+    cursor.insAtDirEnd(dir, cursor.parent);
 
     if (cursor[L].siblingDeleted) cursor[L].siblingDeleted(cursor.options, R);
     if (cursor[R].siblingDeleted) cursor[R].siblingDeleted(cursor.options, L);
diff --git a/test/unit/typing.test.js b/test/unit/typing.test.js
index c2f8462..b67677e 100644
--- a/test/unit/typing.test.js
+++ b/test/unit/typing.test.js
@@ -472,6 +472,26 @@
         assertLatex('\\left(1+2\\right)+3+4+5');
       });
 
+      test('typing Ctrl-Backspace deletes everything to the left of the cursor', function () {
+        mq.typedText('12345');
+        assertLatex('12345');
+        mq.keystroke('Left Left');
+        mq.keystroke('Ctrl-Backspace');
+        assertLatex('45');
+        mq.keystroke('Ctrl-Backspace');
+        assertLatex('45');
+      });
+
+      test('typing Ctrl-Del deletes everything to the right of the cursor', function () {
+        mq.typedText('12345');
+        assertLatex('12345');
+        mq.keystroke('Left Left');
+        mq.keystroke('Ctrl-Del');
+        assertLatex('123');
+        mq.keystroke('Ctrl-Del');
+        assertLatex('123');
+      });
+
       suite('pipes', function() {
         test('typing then backspacing a pipe in the middle of 1+2+3+4', function() {
           mq.typedText('1+2+3+4');
diff --git a/test/visual.html b/test/visual.html
index 1f77a3c..3d091f5 100644
--- a/test/visual.html
+++ b/test/visual.html
@@ -212,6 +212,11 @@
 <tr><td><span class="mathquill-static-math">\vec x + \tilde x + \vec A + \tilde A + \vec{abcd} + \tilde{abcd}</span><td><span>\vec x + \tilde x + \vec A + \tilde A + \vec{abcd} + \tilde{abcd}</span>^M
 <tr><td><span class="mathquill-static-math">\int _{\phi =0}^{2\pi }\int _{\theta =0}^{\pi }\int _{r=0}^{\infty }f(r,\theta ,\phi )r^2\sin \theta drd\theta d\phi </span><td><span>\int _{\phi =0}^{2\pi }\int _{\theta =0}^{\pi }\int _{r=0}^{\infty }f(r,\theta ,\phi )r^2\sin \theta drd\theta d\phi </span>
 <tr><td><span class="mathquill-static-math">\int_0^{\frac{\frac{1}{2}}{3}} \int_0^{\frac{1}{\frac{2}{3}}} \int_0^{\frac{1}{\frac{2}{\frac{3}{\frac{4}{5}}}}}</span><td><span>\int_0^{\frac{\frac{1}{2}}{3}} \int_0^{\frac{1}{\frac{2}{3}}} \int_0^{\frac{1}{\frac{2}{\frac{3}{\frac{4}{5}}}}}</span>
+<tr><td><span class="mathquill-static-math">\overline{abc}</span><td><span>\overline{abc}</span>
+<tr><td><span class="mathquill-static-math">\overleftarrow{abc}</span><td><span>\overleftarrow{abc}</span>
+<tr><td><span class="mathquill-static-math">\overrightarrow{abc}</span><td><span>\overrightarrow{abc}</span>
+<tr><td><span class="mathquill-static-math">\overleftrightarrow{abc}</span><td><span>\overleftrightarrow{abc}</span>
+<tr><td><span class="mathquill-static-math">\overarc{abc}</span><td><span>\overarc{abc}</span>
 <tr><td colspan=2><span id="sixes"></span>
 <script>
 $(function() {