diff --git a/package.json b/package.json
index 8eb3d956..ada3ffb9 100644
--- a/package.json
+++ b/package.json
@@ -135,6 +135,7 @@
     "react-sidebar": "^2.2.1",
     "react-simple-dnd": "^0.1.2",
     "react-sortable": "^1.2.0",
+    "react-split-pane": "^0.1.57",
     "react-toolbox": "^1.2.1",
     "react-topbar-progress-indicator": "^1.0.0",
     "react-waypoint": "^3.1.3",
diff --git a/src/components/EntryEditor/EntryEditor.css b/src/components/EntryEditor/EntryEditor.css
index bb047a7e..70a8aa4f 100644
--- a/src/components/EntryEditor/EntryEditor.css
+++ b/src/components/EntryEditor/EntryEditor.css
@@ -4,34 +4,37 @@
 }
 
 .root {
-  position: absolute;
-  top: 0;
-  bottom: 0;
-  display: flex;
-  flex-direction: column;
-  width: 100%;
-}
 
-.container {
-  display: flex;
-  flex: 1;
-}
-
-.footer {
-  flex: 0;
-  padding: 10px 20px;
-  border-top: 1px solid var(--defaultColorLight);
-  background: var(--backgroundColor);
-  text-align: right;
 }
 
 .controlPane {
-  flex: 1;
+  height: calc(100% - 55px);
   overflow: auto;
   padding: 0 20px;
   border-right: 1px solid var(--defaultColorLight);
 }
 
 .previewPane {
-  flex: 1;
+  height: calc(100% - 55px);
+}
+
+.blocker {
+}
+
+.blocker > * {
+  pointer-events: none;
+}
+
+
+.footer {
+  height: 55px;
+  padding: 10px 20px;
+  position: absolute;
+  z-index: 9999;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  border-top: 1px solid var(--defaultColorLight);
+  background: var(--backgroundColor);
+  text-align: right;
 }
diff --git a/src/components/EntryEditor/EntryEditor.js b/src/components/EntryEditor/EntryEditor.js
index 92aae5c5..553beed7 100644
--- a/src/components/EntryEditor/EntryEditor.js
+++ b/src/components/EntryEditor/EntryEditor.js
@@ -1,59 +1,86 @@
-import React, { PropTypes } from 'react';
+import React, { Component, PropTypes } from 'react';
 import ImmutablePropTypes from 'react-immutable-proptypes';
+import SplitPane from 'react-split-pane';
 import { ScrollSync, ScrollSyncPane } from '../ScrollSync';
 import ControlPane from '../ControlPanel/ControlPane';
 import PreviewPane from '../PreviewPane/PreviewPane';
 import Toolbar from './EntryEditorToolbar';
 import styles from './EntryEditor.css';
 
-export default function EntryEditor(
-  {
-    collection,
-    entry,
-    fields,
-    getMedia,
-    onChange,
-    onAddMedia,
-    onRemoveMedia,
-    onPersist,
-    onCancelEdit,
-  }) {
-  return (
-    <div className={styles.root}>
-      <ScrollSync>
-        <div className={styles.container}>
-          <ScrollSyncPane>
-            <div className={styles.controlPane}>
-              <ControlPane
-                collection={collection}
-                entry={entry}
-                fields={fields}
-                getMedia={getMedia}
-                onChange={onChange}
-                onAddMedia={onAddMedia}
-                onRemoveMedia={onRemoveMedia}
-              />
-            </div>
-          </ScrollSyncPane>
-          <div className={styles.previewPane}>
-            <PreviewPane
-              collection={collection}
-              entry={entry}
-              fields={fields}
-              getMedia={getMedia}
-            />
+class EntryEditor extends Component {
+  state = {
+    showEventBlocker: false,
+  };
+
+  handleSplitPaneDragStart = () => {
+    this.setState({ showEventBlocker: true });
+  };
+
+  handleSplitPaneDragFinished = () => {
+    this.setState({ showEventBlocker: false });
+  };
+
+  render() {
+    const {
+        collection,
+        entry,
+        fields,
+        getMedia,
+        onChange,
+        onAddMedia,
+        onRemoveMedia,
+        onPersist,
+        onCancelEdit,
+    } = this.props;
+
+    const controlClassName = `${ styles.controlPane } ${ this.state.showEventBlocker && styles.blocker }`;
+    const previewClassName = `${ styles.previewPane } ${ this.state.showEventBlocker && styles.blocker }`;
+    return (
+      <div className={styles.root}>
+        <ScrollSync>
+          <div className={styles.container}>
+            <SplitPane
+              defaultSize="50%"
+              onDragStarted={this.handleSplitPaneDragStart}
+              onDragFinished={this.handleSplitPaneDragFinished}
+            >
+              <ScrollSyncPane>
+                <div className={controlClassName}>
+
+                  <ControlPane
+                    collection={collection}
+                    entry={entry}
+                    fields={fields}
+                    getMedia={getMedia}
+                    onChange={onChange}
+                    onAddMedia={onAddMedia}
+                    onRemoveMedia={onRemoveMedia}
+                  />
+
+                </div>
+              </ScrollSyncPane>
+              <div className={previewClassName}>
+                <PreviewPane
+                  collection={collection}
+                  entry={entry}
+                  fields={fields}
+                  getMedia={getMedia}
+                />
+              </div>
+            </SplitPane>
           </div>
+        </ ScrollSync>
+        <div className={styles.footer}>
+          <Toolbar
+            isPersisting={entry.get('isPersisting')}
+            onPersist={onPersist}
+            onCancelEdit={onCancelEdit}
+          />
         </div>
-      </ScrollSync>
-      <div className={styles.footer}>
-        <Toolbar
-          isPersisting={entry.get('isPersisting')}
-          onPersist={onPersist}
-          onCancelEdit={onCancelEdit}
-        />
+
       </div>
-    </div>
-  );
+    );
+  }
 }
 
 EntryEditor.propTypes = {
@@ -67,3 +94,6 @@ EntryEditor.propTypes = {
   onRemoveMedia: PropTypes.func.isRequired,
   onCancelEdit: PropTypes.func.isRequired,
 };
+
+
+export default EntryEditor;
diff --git a/src/index.css b/src/index.css
index 6d5c7871..e590a825 100644
--- a/src/index.css
+++ b/src/index.css
@@ -92,6 +92,38 @@ h1 {
     background-color: #ddd;
   }
 
+  & .Resizer {
+    background: #000;
+    opacity: .2;
+    z-index: 1;
+    box-sizing: border-box;
+    background-clip: padding-box;
+  }
+
+  & .Resizer:hover {
+    -webkit-transition: all 2s ease;
+    transition: all 2s ease;
+  }
+
+  & .Resizer.vertical {
+    width: 11px;
+    margin: 0 -5px;
+    border-left: 5px solid rgba(255, 255, 255, 0);
+    border-right: 5px solid rgba(255, 255, 255, 0);
+    cursor: col-resize;
+  }
+
+  & .Resizer.vertical:hover {
+    border-left: 5px solid rgba(0, 0, 0, 0.5);
+    border-right: 5px solid rgba(0, 0, 0, 0.5);
+  }
+  & .Resizer.disabled {
+    cursor: not-allowed;
+  }
+  & .Resizer.disabled:hover {
+    border-color: transparent;
+  }
+
 
   & .rdt {
     position: relative;
diff --git a/yarn.lock b/yarn.lock
index 9a7e2947..b675ff8f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1175,6 +1175,10 @@ boom@2.x.x:
   dependencies:
     hoek "2.x.x"
 
+bowser@^1.0.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/bowser/-/bowser-1.6.0.tgz#37fc387b616cb6aef370dab4d6bd402b74c5c54d"
+
 boxen@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/boxen/-/boxen-0.3.1.tgz#a7d898243ae622f7abb6bb604d740a76c6a5461b"
@@ -3538,6 +3542,10 @@ https-browserify@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/https-browserify/-/https-browserify-0.0.1.tgz#3f91365cabe60b77ed0ebba24b454e3e09d95a82"
 
+hyphenate-style-name@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/hyphenate-style-name/-/hyphenate-style-name-1.0.2.tgz#31160a36930adaf1fc04c6074f7eb41465d4ec4b"
+
 iconv-lite@^0.4.13, iconv-lite@~0.4.13, iconv-lite@0.4.13:
   version "0.4.13"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.13.tgz#1f88aba4ab0b1508e8312acc39345f36e992e2f2"
@@ -3643,6 +3651,13 @@ inline-process-browser@^1.0.0:
     falafel "^1.0.1"
     through2 "^0.6.5"
 
+inline-style-prefixer@^2.0.4:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/inline-style-prefixer/-/inline-style-prefixer-2.0.5.tgz#c153c7e88fd84fef5c602e95a8168b2770671fe7"
+  dependencies:
+    bowser "^1.0.0"
+    hyphenate-style-name "^1.0.1"
+
 inquirer@^0.12.0:
   version "0.12.0"
   resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-0.12.0.tgz#1ef2bfd63504df0bc75785fff8c2c41df12f077e"
@@ -7105,6 +7120,17 @@ react-sortable@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/react-sortable/-/react-sortable-1.2.0.tgz#5acd7e1910df665408957035acb5f2354519d849"
 
+react-split-pane:
+  version "0.1.57"
+  resolved "https://registry.yarnpkg.com/react-split-pane/-/react-split-pane-0.1.57.tgz#7cc2d30841ae6a3e246ee613a9858012528d894f"
+  dependencies:
+    inline-style-prefixer "^2.0.4"
+    react-style-proptype "^1.4.0"
+
+react-style-proptype@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/react-style-proptype/-/react-style-proptype-1.4.0.tgz#d82c4093b73767e3efaacba013cea22a50e7b5ee"
+
 react-themeable@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/react-themeable/-/react-themeable-1.1.0.tgz#7d4466dd9b2b5fa75058727825e9f152ba379a0e"