diff --git a/apps/spreadsheeteditor/main/app/controller/CellEditor.js b/apps/spreadsheeteditor/main/app/controller/CellEditor.js
index cb92d6915..f7bbddcbb 100644
--- a/apps/spreadsheeteditor/main/app/controller/CellEditor.js
+++ b/apps/spreadsheeteditor/main/app/controller/CellEditor.js
@@ -133,6 +133,8 @@ define([
         },
 
         onApiEditCell: function(state) {
+            if (this.viewmode) return; // signed file
+
             if (state == Asc.c_oAscCellEditorState.editStart){
                 this.api.isCellEdited = true;
                 this.editor.cellNameDisabled(true);
@@ -151,6 +153,8 @@ define([
         },
 
         onApiSelectionChanged: function(info) {
+            if (this.viewmode) return; // signed file
+
             var seltype = info.asc_getSelectionType(),
                 coauth_disable = (!this.mode.isEditMailMerge && !this.mode.isEditDiagram) ? (info.asc_getLocked() === true || info.asc_getLockedTable() === true || info.asc_getLockedPivotTable()===true) : false;
 
@@ -241,6 +245,8 @@ define([
         },
 
         onInsertFunction: function() {
+            if (this.viewmode) return; // signed file
+
             if ( this.mode.isEdit && !this.editor.$btnfunc['hasClass']('disabled')) {
                 var controller = this.getApplication().getController('FormulaDialog');
                 if (controller) {
@@ -314,6 +320,13 @@ define([
         disableEditing: function(disabled) {
             this.editor.$btnfunc[!disabled?'removeClass':'addClass']('disabled');
             this.editor.btnNamedRanges.setVisible(!disabled);
+        },
+
+        setPreviewMode: function(mode) {
+            if (this.viewmode === mode) return;
+            this.viewmode = mode;
+            this.editor.$btnfunc[!mode?'removeClass':'addClass']('disabled');
+            this.editor.cellNameDisabled(mode);
         }
     });
 });
\ No newline at end of file
diff --git a/apps/spreadsheeteditor/main/app/controller/Viewport.js b/apps/spreadsheeteditor/main/app/controller/Viewport.js
index 0a90ed4f9..f9b07b8b3 100644
--- a/apps/spreadsheeteditor/main/app/controller/Viewport.js
+++ b/apps/spreadsheeteditor/main/app/controller/Viewport.js
@@ -458,6 +458,7 @@ define([
             var appConfig = me.viewport.mode;
             if ( !!appConfig && !appConfig.isEditDiagram && !appConfig.isEditMailMerge ) {
                 if (index == this.api.asc_getActiveWorksheetIndex()) {
+                    locked = locked || me.viewmode;
                     me.header.mnuitemHideHeadings.setDisabled(locked);
                     me.header.mnuitemHideGridlines.setDisabled(locked);
                     me.header.mnuitemFreezePanes.setDisabled(locked);
@@ -505,7 +506,10 @@ define([
         },
 
         disableEditing: function (disabled) {
-            this.header.btnOptions.menu.items[6].setDisabled(disabled);
+            this.viewmode = disabled;
+            this.header.mnuitemHideHeadings.setDisabled(disabled);
+            this.header.mnuitemHideGridlines.setDisabled(disabled);
+            this.header.mnuitemFreezePanes.setDisabled(disabled);
         },
 
         textHideFBar: 'Hide Formula Bar',
diff --git a/apps/spreadsheeteditor/main/app/view/SignatureSettings.js b/apps/spreadsheeteditor/main/app/view/SignatureSettings.js
index b05e67694..a52299ad3 100644
--- a/apps/spreadsheeteditor/main/app/view/SignatureSettings.js
+++ b/apps/spreadsheeteditor/main/app/view/SignatureSettings.js
@@ -388,6 +388,8 @@ define([
                 SSE.getController('Statusbar').SetDisabled(disable);
                 SSE.getController('Common.Controllers.ReviewChanges').SetDisabled(disable);
                 SSE.getController('DocumentHolder').SetDisabled(disable, true);
+                SSE.getController('CellEditor').setPreviewMode(disable);
+                SSE.getController('Viewport').disableEditing(disable);
 
                 // var leftMenu = SSE.getController('LeftMenu').leftMenu;
                 // leftMenu.btnComments.setDisabled(disable);
diff --git a/apps/spreadsheeteditor/main/app/view/Statusbar.js b/apps/spreadsheeteditor/main/app/view/Statusbar.js
index 4fab2e202..2d83f985b 100644
--- a/apps/spreadsheeteditor/main/app/view/Statusbar.js
+++ b/apps/spreadsheeteditor/main/app/view/Statusbar.js
@@ -178,7 +178,7 @@ define([
                     //'tab:manual'        : _.bind(this.onAddTabClick, this),
                     'tab:contextmenu'   : _.bind(this.onTabMenu, this),
                     'tab:dblclick'      : _.bind(function () {
-                        if (me.editMode && (me.rangeSelectionMode !== Asc.c_oAscSelectionDialogType.Chart) &&
+                        if (me.editMode && !(me.mode && me.mode.isDisconnected) && (me.rangeSelectionMode !== Asc.c_oAscSelectionDialogType.Chart) &&
                                            (me.rangeSelectionMode !== Asc.c_oAscSelectionDialogType.FormatTable)&&
                                            (me.rangeSelectionMode !== Asc.c_oAscSelectionDialogType.PrintTitles)) {
                             me.fireEvent('sheet:changename');
@@ -502,7 +502,7 @@ define([
                             label         : me.api.asc_getWorksheetName(i),
 //                          reorderable   : !locked,
                             cls           : locked ? 'coauth-locked':'',
-                            isLockTheDrag : locked,
+                            isLockTheDrag : locked || me.mode.isDisconnected,
                             iconCls       : 'btn-sheet-view',
                             iconTitle     : name,
                             iconVisible   : name!==''