diff --git a/src/main/redux/reducers/reader/defaultConfig.ts b/src/common/redux/reducers/reader/defaultConfig.ts
similarity index 100%
rename from src/main/redux/reducers/reader/defaultConfig.ts
rename to src/common/redux/reducers/reader/defaultConfig.ts
diff --git a/src/common/redux/states/commonRootState.ts b/src/common/redux/states/commonRootState.ts
index 1dfa57bdc..b25f33250 100644
--- a/src/common/redux/states/commonRootState.ts
+++ b/src/common/redux/states/commonRootState.ts
@@ -7,8 +7,12 @@
 
 import { ISessionState } from "readium-desktop/common/redux/states/session";
 import { IKeyboardState } from "readium-desktop/common/redux/states/keyboard";
+import { ReaderConfig } from "readium-desktop/common/models/reader";
 
 export interface ICommonRootState {
     session: ISessionState
     keyboard: IKeyboardState;
+    reader: {
+        defaultConfig: ReaderConfig,
+    };
 }
diff --git a/src/common/redux/states/renderer/readerRootState.ts b/src/common/redux/states/renderer/readerRootState.ts
index 27f620442..527cbe8ef 100644
--- a/src/common/redux/states/renderer/readerRootState.ts
+++ b/src/common/redux/states/renderer/readerRootState.ts
@@ -35,4 +35,5 @@ export interface IReaderStateReader {
         mounter: TMapState<string, IHighlight>;
     };
     divina: IDivinaState;
+    defaultConfig: ReaderConfig; // sync across all app
 }
diff --git a/src/main/redux/middleware/sync.ts b/src/main/redux/middleware/sync.ts
index 3491f76a6..e2c535768 100644
--- a/src/main/redux/middleware/sync.ts
+++ b/src/main/redux/middleware/sync.ts
@@ -59,6 +59,8 @@ const SYNCHRONIZABLE_ACTIONS: string[] = [
 
     catalogActions.setCatalog.ID, // send new catalogView to library
     catalogActions.setTagView.ID,
+
+    readerActions.configSetDefault.ID, // readerConfig
 ];
 
 export const reduxSyncMiddleware: Middleware
diff --git a/src/main/redux/reducers/index.ts b/src/main/redux/reducers/index.ts
index 863449335..98d36f798 100644
--- a/src/main/redux/reducers/index.ts
+++ b/src/main/redux/reducers/index.ts
@@ -16,7 +16,7 @@ import { combineReducers } from "redux";
 
 import { appActions, publicationActions, winActions } from "../actions";
 import { lcpReducer } from "./lcp";
-import { readerDefaultConfigReducer } from "./reader/defaultConfig";
+import { readerDefaultConfigReducer } from "../../../common/redux/reducers/reader/defaultConfig";
 import { winRegistryReaderReducer } from "./win/registry/reader";
 import { winSessionLibraryReducer } from "./win/session/library";
 import { winSessionReaderReducer } from "./win/session/reader";
diff --git a/src/main/redux/states/index.ts b/src/main/redux/states/index.ts
index 4ff1a4e23..e706c5fdd 100644
--- a/src/main/redux/states/index.ts
+++ b/src/main/redux/states/index.ts
@@ -5,7 +5,7 @@
 // that can be found in the LICENSE file exposed on Github (readium) in the project repository.
 // ==LICENSE-END==
 
-import { ReaderConfig, ReaderMode } from "readium-desktop/common/models/reader";
+import { ReaderMode } from "readium-desktop/common/models/reader";
 import { I18NState } from "readium-desktop/common/redux/states/i18n";
 import { IKeyboardState } from "readium-desktop/common/redux/states/keyboard";
 import { OpdsFeedDocument } from "readium-desktop/main/db/document/opds";
@@ -25,9 +25,6 @@ export interface RootState extends ICommonRootState {
     // net: NetState;
     i18n: I18NState;
     streamer: StreamerState;
-    reader: {
-        defaultConfig: ReaderConfig,
-    };
     // update: UpdateState;
     win: {
         session: {
diff --git a/src/renderer/common/redux/states/renderer/readerRootState.ts b/src/renderer/common/redux/states/renderer/readerRootState.ts
index 120932b7e..baa189ef3 100644
--- a/src/renderer/common/redux/states/renderer/readerRootState.ts
+++ b/src/renderer/common/redux/states/renderer/readerRootState.ts
@@ -15,4 +15,5 @@ export interface IReaderRootState extends IRendererCommonRootState {
 export interface IReaderStateReader {
     config: ReaderConfig;
     info: ReaderInfo;
+    defaultConfig: ReaderConfig;
 }
diff --git a/src/renderer/library/redux/middleware/sync.ts b/src/renderer/library/redux/middleware/sync.ts
index 6bf94611b..1ab93be45 100644
--- a/src/renderer/library/redux/middleware/sync.ts
+++ b/src/renderer/library/redux/middleware/sync.ts
@@ -39,6 +39,8 @@ const SYNCHRONIZABLE_ACTIONS: string[] = [
     lcpActions.unlockPublicationWithPassphrase.ID,
 
     catalogActions.getCatalog.ID, // request to get catalog view
+
+    readerActions.configSetDefault.ID, // readerConfig
 ];
 
 export const reduxSyncMiddleware = syncFactory(SYNCHRONIZABLE_ACTIONS);
diff --git a/src/renderer/library/redux/reducers/index.ts b/src/renderer/library/redux/reducers/index.ts
index f27afe05d..9c775843a 100644
--- a/src/renderer/library/redux/reducers/index.ts
+++ b/src/renderer/library/redux/reducers/index.ts
@@ -26,9 +26,13 @@ import { RouterState } from "redux-first-history";
 import { sessionReducer } from "readium-desktop/common/redux/reducers/session";
 import { catalogViewReducer } from "./catalog";
 import { tagReducer } from "./tag";
+import { readerDefaultConfigReducer } from "readium-desktop/common/redux/reducers/reader/defaultConfig";
 
 export const rootReducer = (routerReducer: Reducer<RouterState>) => {
     return combineReducers<ILibraryRootState>({
+        reader: combineReducers({
+            defaultConfig: readerDefaultConfigReducer,
+        }),
         session: sessionReducer,
         i18n: i18nReducer,
         opds: combineReducers({
diff --git a/src/renderer/reader/redux/middleware/sync.ts b/src/renderer/reader/redux/middleware/sync.ts
index e84eeb9ca..97b0c73ae 100644
--- a/src/renderer/reader/redux/middleware/sync.ts
+++ b/src/renderer/reader/redux/middleware/sync.ts
@@ -20,7 +20,7 @@ const SYNCHRONIZABLE_ACTIONS: string[] = [
     readerActions.closeRequest.ID,
     readerActions.detachModeRequest.ID,
     readerActions.setReduxState.ID,
-    readerActions.configSetDefault.ID,
+    readerActions.configSetDefault.ID,  // readerConfig
     // readerActions.saveBookmarkRequest.ID,
     readerActions.fullScreenRequest.ID,
 
diff --git a/src/renderer/reader/redux/reducers/index.ts b/src/renderer/reader/redux/reducers/index.ts
index adabf5a21..0d7f6b329 100644
--- a/src/renderer/reader/redux/reducers/index.ts
+++ b/src/renderer/reader/redux/reducers/index.ts
@@ -31,6 +31,7 @@ import { priorityQueueReducer } from "readium-desktop/utils/redux-reducers/pqueu
 import { winModeReducer } from "readium-desktop/common/redux/reducers/winModeReducer";
 import { readerDivinaReducer } from "./divina";
 import { sessionReducer } from "readium-desktop/common/redux/reducers/session";
+import { readerDefaultConfigReducer } from "readium-desktop/common/redux/reducers/reader/defaultConfig";
 
 export const rootReducer = () => {
     return combineReducers<IReaderRootState>({
@@ -38,6 +39,7 @@ export const rootReducer = () => {
         api: apiReducer,
         i18n: i18nReducer,
         reader: combineReducers<IReaderStateReader>({ // dehydrated from main process registry (preloaded state)
+            defaultConfig: readerDefaultConfigReducer,
             config: readerConfigReducer,
             info: readerInfoReducer,
             locator: readerLocatorReducer,