diff --git a/packages/onlyoffice/frontend/office.page.ts b/packages/onlyoffice/frontend/office.page.ts
index 9ca481af2..e5e2aada4 100644
--- a/packages/onlyoffice/frontend/office.page.ts
+++ b/packages/onlyoffice/frontend/office.page.ts
@@ -35,9 +35,9 @@ const loader = (mode) => async (element) => {
 const getEles = (types: string[]) => types.flatMap((type) => $(`div[data-${type}]`).get());
 
 addPage(new AutoloadPage('onlyoffice', async () => {
-  const all = getEles(['doc', 'docx', 'cell', 'xls', 'xlsx', 'slide', 'ppt', 'pptx']);
+  const all = getEles(['doc', 'docx', 'cell', 'xls', 'xlsx', 'slide', 'ppt', 'pptx', 'pdf']);
   if (all.length) await load();
-  getEles(['doc', 'docx']).forEach(loader('word'));
+  getEles(['doc', 'docx', 'pdf']).forEach(loader('word'));
   getEles(['cell', 'xls', 'xlsx']).forEach(loader('cell'));
   getEles(['slide', 'ppt', 'pptx']).forEach(loader('slide'));
 }));
diff --git a/packages/onlyoffice/index.ts b/packages/onlyoffice/index.ts
index 5e7d04d89..621a853a2 100644
--- a/packages/onlyoffice/index.ts
+++ b/packages/onlyoffice/index.ts
@@ -1,4 +1,5 @@
 import { sign } from 'jsonwebtoken';
+import { } from '@hydrooj/ui-default/backendlib/markdown-it-media';
 import {
     Context, Handler, SystemModel, UiContextBase,
 } from 'hydrooj';
@@ -15,6 +16,7 @@ class OnlyofficeJWTHandler extends Handler {
 
     async get({ url }) {
         const path = new URL(url).pathname;
+        const allowDownload = !!SystemModel.get('onlyoffice.allowDownload');
         const payload = {
             document: {
                 fileType: path.split('.').pop(),
@@ -23,19 +25,19 @@ class OnlyofficeJWTHandler extends Handler {
                 url,
                 permissions: {
                     comment: false,
-                    copy: true,
-                    download: true,
+                    copy: allowDownload,
+                    download: allowDownload,
                     edit: false,
                     fillForms: false,
                     modifyContentControl: false,
                     modifyFilter: false,
-                    print: true,
+                    print: allowDownload,
                     protect: false,
                     review: false,
                 },
             },
             editorConfig: {
-                lang: this.user.viewLang.includes('_') ? this.user.viewLang.split('_')[0] : this.user.viewLang,
+                lang: this.user.viewLang?.includes('_') ? this.user.viewLang.split('_')[0] : this.user.viewLang || 'zh',
                 mode: 'view',
                 user: {
                     group: 'Hydro',
@@ -73,4 +75,11 @@ export function apply(ctx: Context) {
         });
     });
     ctx.Route('onlyoffice-jwt', '/onlyoffice-jwt', OnlyofficeJWTHandler);
+    if (SystemModel.get('onlyoffice.pdf')) {
+        ctx.provideModule('richmedia', 'pdf', {
+            get(service, src, md) {
+                return `<div data-${service}>${md.utils.escapeHtml(src)}</div>`;
+            },
+        });
+    }
 }
diff --git a/packages/onlyoffice/setting.yaml b/packages/onlyoffice/setting.yaml
index 42bb9d557..9ca0b5d66 100644
--- a/packages/onlyoffice/setting.yaml
+++ b/packages/onlyoffice/setting.yaml
@@ -7,4 +7,9 @@ jwtsecret:
   type: text
   name: jwtsecret
   desc: JWT Secret
-  default: secret
\ No newline at end of file
+  default: secret
+pdf:
+  type: boolean
+  name: pdf
+  desc: Handle pdf documents
+  default: false
diff --git a/packages/ui-default/backendlib/markdown-it-media.ts b/packages/ui-default/backendlib/markdown-it-media.ts
index eba2430f5..98fcf68aa 100644
--- a/packages/ui-default/backendlib/markdown-it-media.ts
+++ b/packages/ui-default/backendlib/markdown-it-media.ts
@@ -83,7 +83,7 @@ function resourceUrl(service: string, src: string, url: string) {
 declare module 'hydrooj' {
   interface ModuleInterfaces {
     richmedia: {
-      get: (src: string) => string | null;
+      get: (service: string, src: string, md: MarkdownIt) => string | null;
     }
   }
 }
@@ -94,7 +94,7 @@ export function Media(md: MarkdownIt) {
     let src = md.utils.escapeHtml(tokens[idx].attrGet('src'));
     const service = md.utils.escapeHtml(tokens[idx].attrGet('service')).toLowerCase();
     if (Hydro.module.richmedia?.[service]) {
-      const result = Hydro.module.richmedia[service].get(src);
+      const result = Hydro.module.richmedia[service].get(service, src, md);
       if (result) return result;
     }
     if (service === 'pdf') {
diff --git a/packages/ui-default/components/notification/index.ts b/packages/ui-default/components/notification/index.ts
index f1ad49f2b..bb74fb19a 100644
--- a/packages/ui-default/components/notification/index.ts
+++ b/packages/ui-default/components/notification/index.ts
@@ -1,18 +1,18 @@
-import { Intent, Position, Toaster } from '@blueprintjs/core';
+import { Intent, OverlayToaster, Position } from '@blueprintjs/core';
 import $ from 'jquery';
 import { tpl, zIndexManager } from 'vj/utils/base';
 
 const ToasterContainer = document.createElement('div');
 ToasterContainer.style.position = 'fixed';
 ToasterContainer.style.bottom = '0px';
+ToasterContainer.style.width = '100%';
 ToasterContainer.style.zIndex = '9999';
 document.body.append(ToasterContainer);
 
-export const AppToaster = Toaster.create({
-  className: 'recipe-toaster',
-  position: Position.LEFT_BOTTOM,
-  usePortal: true,
-} as any, ToasterContainer);
+const AppToaster = OverlayToaster.createAsync(
+  { position: Position.BOTTOM_LEFT, usePortal: false },
+  { container: ToasterContainer },
+);
 
 interface NotificationOptions {
   avatar?: string;
@@ -65,20 +65,20 @@ export default class Notification {
     setTimeout(() => this.$n.remove(), 200);
   }
 
-  static success(message: string, duration?: number) {
-    return AppToaster.show({ message, timeout: duration, intent: Intent.SUCCESS });
+  static async success(message: string, duration?: number) {
+    return (await AppToaster).show({ message, timeout: duration, intent: Intent.SUCCESS });
   }
 
-  static info(message: string, duration?: number) {
-    return AppToaster.show({ message, timeout: duration, intent: Intent.PRIMARY });
+  static async info(message: string, duration?: number) {
+    return (await AppToaster).show({ message, timeout: duration, intent: Intent.PRIMARY });
   }
 
-  static warn(message: string, duration?: number) {
-    return AppToaster.show({ message, timeout: duration, intent: Intent.WARNING });
+  static async warn(message: string, duration?: number) {
+    return (await AppToaster).show({ message, timeout: duration, intent: Intent.WARNING });
   }
 
-  static error(message: string, duration?: number) {
-    return AppToaster.show({ message, timeout: duration, intent: Intent.DANGER });
+  static async error(message: string, duration?: number) {
+    return (await AppToaster).show({ message, timeout: duration, intent: Intent.DANGER });
   }
 }
 
diff --git a/packages/ui-default/misc/typography.styl b/packages/ui-default/misc/typography.styl
index 659a3d7ec..03e804089 100644
--- a/packages/ui-default/misc/typography.styl
+++ b/packages/ui-default/misc/typography.styl
@@ -261,7 +261,7 @@ small, figcaption
 
 .typo
   word-wrap()
-  overflow: auto
+  overflow: auto hidden;
 
 .typo a, .typo .link, .typo-a
   &, &:visited, &:active, &:hover