Index: src/wp-admin/js/editor-expand.js
===================================================================
--- src/wp-admin/js/editor-expand.js	(revision 29186)
+++ src/wp-admin/js/editor-expand.js	(working copy)
@@ -136,6 +136,8 @@
 				buffer = 10,
 				cursorTop, cursorBottom, editorTop, editorBottom;
 
+				VK.HOME = 36;
+
 			if ( ! offset ) {
 				return;
 			}
@@ -147,7 +149,7 @@
 			editorTop = $adminBar.outerHeight() + $tools.outerHeight() + $visualTop.outerHeight();
 			editorBottom = windowHeight - $bottom.outerHeight();
 
-			if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE ) ) {
+			if ( cursorTop < editorTop && ( key === VK.UP || key === VK.LEFT || key === VK.BACKSPACE || ( key === VK.HOME && VK.modifierPressed( event ) ) ) ) {
 				window.scrollTo( window.pageXOffset, cursorTop + window.pageYOffset - editorTop );
 			} else if ( cursorBottom > editorBottom ) {
 				window.scrollTo( window.pageXOffset, cursorBottom + window.pageYOffset - editorBottom );