Index: src/wp-admin/css/edit.css
===================================================================
--- src/wp-admin/css/edit.css	(revision 34644)
+++ src/wp-admin/css/edit.css	(working copy)
@@ -1287,6 +1287,10 @@
 	transition-timing-function: ease-in-out;
 }
 
+.button-split-wrap {
+	display: none;
+}
+
 /* =Media Queries
 -------------------------------------------------------------- */
 
@@ -1574,3 +1578,100 @@
 		padding: 0 10px 0 10px;
 	}
 }
+
+@media only screen and (max-width: 480px) {
+
+	#edit-slug-box {
+		padding: 0;
+		min-height: 0;
+	}
+
+	.edit-slug-box:after { /* clearfix */
+		content: "";
+		display: table;
+		clear: both;
+	}
+
+	.edit-slug-box strong,
+	#sample-permalink {
+		display: none;
+	}
+
+	.edit-slug-buttons,
+	.view-post-btn {
+		vertical-align: middle;
+	}
+
+	.edit-slug-buttons {
+		float: left;
+	}
+
+	.view-post-btn {
+		float: right;
+	}
+
+	.edit-slug-buttons .edit-slug.button {
+		margin-bottom: 0;
+	}
+
+	#wp-content-editor-tools {
+		padding-top: 0;
+	}
+
+	.wp-media-buttons {
+		margin: 1em 0;
+	}
+
+	.wp-media-buttons .button {
+		display: block;
+		text-align: center;
+	}
+
+	.button-split-wrap {
+		display: block;
+	}
+
+	#insert-media-button {
+		display: none;
+	}
+
+	.button-split-wrap:after {
+		content: "";
+		display: table;
+		clear: both;
+	}
+
+	.button-split-wrap .button {
+		display: inline-block;
+		line-height: 2em;
+	}
+
+	.button.button-split-main {
+		float: left;
+		width: 85%;
+		border-right: none;
+		border-top-right-radius: 0;
+		border-bottom-right-radius: 0;
+	}
+
+	.button.button-split-side {
+		float: right;
+		width: 15%;
+		border-top-left-radius: 0;
+		border-bottom-left-radius: 0;
+	}
+
+	.button-split-side:before {
+		content: '\f140';
+		display: inline-block;
+		position: relative;
+		top: 0.2em;
+		font-family: 'dashicons';
+		font-size: 20px;
+		line-height: 0.5em;
+		color: #888;
+		speak: none;
+		-webkit-font-smoothing: antialiased;
+		-moz-osx-font-smoothing: grayscale;
+	}
+}
\ No newline at end of file
Index: src/wp-admin/edit-form-advanced.php
===================================================================
--- src/wp-admin/edit-form-advanced.php	(revision 34644)
+++ src/wp-admin/edit-form-advanced.php	(working copy)
@@ -582,7 +582,7 @@
 if ( $post_type_object->public && ! ( 'pending' == get_post_status( $post ) && !current_user_can( $post_type_object->cap->publish_posts ) ) ) {
 	$has_sample_permalink = $sample_permalink_html && 'auto-draft' != $post->post_status;
 ?>
-	<div id="edit-slug-box" class="hide-if-no-js">
+	<div id="edit-slug-box" class="edit-slug-box hide-if-no-js">
 	<?php
 		if ( $has_sample_permalink )
 			echo $sample_permalink_html;
Index: src/wp-admin/includes/post.php
===================================================================
--- src/wp-admin/includes/post.php	(revision 34644)
+++ src/wp-admin/includes/post.php	(working copy)
@@ -1324,7 +1324,7 @@
 		$return =  '<strong>' . __( 'Permalink:' ) . "</strong>\n";
 		$return .= '<span id="sample-permalink" tabindex="-1">' . $display_link . "</span>\n";
 		$return .= '&lrm;'; // Fix bi-directional text display defect in RTL languages.
-		$return .= '<span id="edit-slug-buttons"><a href="#post_name" class="edit-slug button button-small hide-if-no-js" onclick="editPermalink(' . $id . '); return false;">' . __( 'Edit' ) . "</a></span>\n";
+		$return .= '<span id="edit-slug-buttons" class="edit-slug-buttons"><a href="#post_name" class="edit-slug button button-small button-link hide-if-no-js" onclick="editPermalink(' . $id . '); return false;">' . __( 'Edit' ) . "</a></span>\n";
 		$return .= '<span id="editable-post-name-full">' . $post_name . "</span>\n";
 	}
 
@@ -1332,7 +1332,7 @@
 		if ( 'draft' == $post->post_status || 'pending' == $post->post_status ) {
 			$draft_link = set_url_scheme( get_permalink( $post->ID ) );
 			$preview_link = get_preview_post_link( $post, array(), $draft_link );
-			$return .= "<span id='view-post-btn'><a href='" . esc_url( $preview_link ) . "' class='button button-small' target='wp-preview-{$post->ID}'>$view_post</a></span>\n";
+			$return .= '<span id="view-post-btn" class="view-post-btn"><a href="' . esc_url( $preview_link ) . '" class="button button-small button-link" target="wp-preview-' . $post->ID . '">' . $view_post . "</a></span>\n";
 		} else {
 			if ( 'publish' === $post->post_status ) {
 				// View Post button should always go to the saved permalink.
Index: src/wp-includes/class-wp-editor.php
===================================================================
--- src/wp-includes/class-wp-editor.php	(revision 34644)
+++ src/wp-includes/class-wp-editor.php	(working copy)
@@ -219,8 +219,14 @@
 				 *
 				 * @param string $editor_id Unique editor identifier, e.g. 'content'.
 				 */
-				do_action( 'media_buttons', $editor_id );
-				echo "</div>\n";
+				do_action( 'media_buttons', $editor_id ); ?>
+				<div class="button-split-wrap">
+					<button class="button button-split-main insert-media add_media" data-editor="content" title="Add Media">
+						<span class="wp-media-buttons-icon"></span> Add Media
+					</button>
+					<button class="button button-split-side"></button>
+				</div>
+				<?php echo "</div>\n";
 			}
 
 			echo '<div class="wp-editor-tabs">' . $buttons . "</div>\n";
Index: src/wp-includes/css/editor.css
===================================================================
--- src/wp-includes/css/editor.css	(revision 34644)
+++ src/wp-includes/css/editor.css	(working copy)
@@ -1709,6 +1709,24 @@
 	}
 }
 
+@media screen and ( max-width: 480px ) {
+	.wp-media-buttons,
+	.wp-editor-tabs {
+		float: none;
+	}
+
+	.wp-media-buttons .button {
+		margin-right: 0;
+	}
+
+	button.wp-switch-editor {
+		display: block;
+		width: 42.3%;
+		margin: 0;
+		padding: 2.4% 3.5%;
+	}
+}
+
 /* =Overlay Body
 -------------------------------------------------------------- */