diff --git a/models/view/src/index.ts b/models/view/src/index.ts
index ec7d39cf12..b8565b830e 100644
--- a/models/view/src/index.ts
+++ b/models/view/src/index.ts
@@ -29,6 +29,7 @@ import type {
   AttributeEditor,
   AttributeFilter,
   AttributePresenter,
+  ActivityAttributePresenter,
   BuildModelKey,
   ClassFilters,
   ClassSortFuncs,
@@ -87,7 +88,8 @@ export function classPresenter (
   _class: Ref<Class<Doc>>,
   presenter: AnyComponent,
   editor?: AnyComponent,
-  popup?: AnyComponent
+  popup?: AnyComponent,
+  activity?: AnyComponent
 ): void {
   builder.mixin(_class, core.class.Class, view.mixin.AttributePresenter, {
     presenter
@@ -98,6 +100,11 @@ export function classPresenter (
       popup
     })
   }
+  if (activity !== undefined) {
+    builder.mixin(_class, core.class.Class, view.mixin.ActivityAttributePresenter, {
+      presenter: activity
+    })
+  }
 }
 
 @Model(view.class.FilteredView, core.class.Doc, DOMAIN_PREFERENCE)
@@ -158,6 +165,11 @@ export class TAttributePresenter extends TClass implements AttributePresenter {
   presenter!: AnyComponent
 }
 
+@Mixin(view.mixin.ActivityAttributePresenter, core.class.Class)
+export class TActivityAttributePresenter extends TClass implements ActivityAttributePresenter {
+  presenter!: AnyComponent
+}
+
 @Mixin(view.mixin.ObjectPresenter, core.class.Class)
 export class TObjectPresenter extends TClass implements ObjectPresenter {
   presenter!: AnyComponent
@@ -337,6 +349,7 @@ export function createModel (builder: Builder): void {
     TAttributeFilter,
     TAttributeEditor,
     TAttributePresenter,
+    TActivityAttributePresenter,
     TListItemPresenter,
     TCollectionEditor,
     TCollectionPresenter,
@@ -387,7 +400,8 @@ export function createModel (builder: Builder): void {
     core.class.TypeMarkup,
     view.component.MarkupPresenter,
     view.component.MarkupEditor,
-    view.component.MarkupEditorPopup
+    view.component.MarkupEditorPopup,
+    view.component.MarkupDiffPresenter
   )
 
   builder.mixin(core.class.TypeMarkup, core.class.Class, view.mixin.InlineAttributEditor, {
diff --git a/models/view/src/plugin.ts b/models/view/src/plugin.ts
index b2d0f3da9d..7c2a2998a0 100644
--- a/models/view/src/plugin.ts
+++ b/models/view/src/plugin.ts
@@ -47,6 +47,7 @@ export default mergeIds(viewId, view, {
     IntlStringPresenter: '' as AnyComponent,
     NumberEditor: '' as AnyComponent,
     NumberPresenter: '' as AnyComponent,
+    MarkupDiffPresenter: '' as AnyComponent,
     MarkupPresenter: '' as AnyComponent,
     BooleanPresenter: '' as AnyComponent,
     BooleanEditor: '' as AnyComponent,
diff --git a/packages/text-editor/src/components/CollaborationDiffViewer.svelte b/packages/text-editor/src/components/CollaborationDiffViewer.svelte
index 57476c88e1..a1e6ec77e1 100644
--- a/packages/text-editor/src/components/CollaborationDiffViewer.svelte
+++ b/packages/text-editor/src/components/CollaborationDiffViewer.svelte
@@ -34,6 +34,8 @@
   export let content: Markup
   export let buttonSize: IconSize = 'small'
   export let comparedVersion: Markup | undefined = undefined
+  export let noButton: boolean = false
+  export let readonly = false
 
   let element: HTMLElement
   let editor: Editor
@@ -41,8 +43,8 @@
   let _decoration = DecorationSet.empty
   let oldContent = ''
 
-  function updateEditor (editor?: Editor, comparedVersion?: Markup): void {
-    const r = calculateDecorations(editor, oldContent, comparedVersion)
+  function updateEditor (editor?: Editor, comparedVersion?: Markup | ArrayBuffer): void {
+    const r = calculateDecorations(editor, oldContent, undefined, comparedVersion)
     if (r !== undefined) {
       oldContent = r.oldContent
       _decoration = r.decorations
@@ -87,6 +89,7 @@
         editor = editor
       }
     })
+    editor.setEditable(!readonly)
   })
 
   onDestroy(() => {
@@ -98,7 +101,7 @@
 </script>
 
 <div class="ref-container">
-  {#if comparedVersion !== undefined}
+  {#if comparedVersion !== undefined && !noButton}
     <div class="flex">
       <div class="flex-grow" />
       <div class="formatPanel buttons-group xsmall-gap mb-4">
diff --git a/packages/text-editor/src/index.ts b/packages/text-editor/src/index.ts
index cfd5054058..22f37b1978 100644
--- a/packages/text-editor/src/index.ts
+++ b/packages/text-editor/src/index.ts
@@ -30,6 +30,8 @@ export { default as CollaborationDiffViewer } from './components/CollaborationDi
 export { default } from './plugin'
 export * from './types'
 export { default as Collaboration } from './components/Collaboration.svelte'
+export { default as IconObjects } from './components/icons/Objects.svelte'
+export { default as StyleButton } from './components/StyleButton.svelte'
 
 addStringsLoader(textEditorId, async (lang: string) => {
   return await import(`../lang/${lang}.json`)
diff --git a/plugins/activity-resources/src/activity.ts b/plugins/activity-resources/src/activity.ts
index db54a38b1c..8672115d59 100644
--- a/plugins/activity-resources/src/activity.ts
+++ b/plugins/activity-resources/src/activity.ts
@@ -301,6 +301,7 @@ class ActivityImpl implements Activity {
     result.collectionAttribute = collectionAttribute
 
     result.doc = firstTx?.doc ?? result.doc
+    result.prevDoc = this.hierarchy.clone(result.doc)
 
     firstTx = firstTx ?? result
     parents.set(tx.objectId, firstTx)
@@ -351,7 +352,7 @@ class ActivityImpl implements Activity {
       results.push(result)
       return results
     }
-    const newResult = results.filter((prevTx) => {
+    const newResults = results.filter((prevTx) => {
       const prevUpdate: any = getCombineOpFromTx(prevTx)
       if (this.isInitTx(prevTx, result)) {
         result = prevTx
@@ -379,8 +380,9 @@ class ActivityImpl implements Activity {
 
       return true
     })
-    newResult.push(result)
-    return newResult
+
+    newResults.push(result)
+    return newResults
   }
 
   isInitTx (prevTx: DisplayTx, result: DisplayTx): boolean {
diff --git a/plugins/activity-resources/src/components/TxView.svelte b/plugins/activity-resources/src/components/TxView.svelte
index c8d2109c11..9454849e03 100644
--- a/plugins/activity-resources/src/components/TxView.svelte
+++ b/plugins/activity-resources/src/components/TxView.svelte
@@ -19,7 +19,7 @@
   import core, { AnyAttribute, Doc, getCurrentAccount, Ref, Class, TxCUD } from '@hcengineering/core'
   import { Asset } from '@hcengineering/platform'
   import { createQuery, getClient } from '@hcengineering/presentation'
-  import {
+  import ui, {
     ActionIcon,
     AnyComponent,
     Component,
@@ -37,7 +37,7 @@
   import { Menu, ObjectPresenter } from '@hcengineering/view-resources'
   import { ActivityKey } from '../activity'
   import activity from '../plugin'
-  import { getValue, TxDisplayViewlet, updateViewlet } from '../utils'
+  import { getPrevValue, getValue, TxDisplayViewlet, updateViewlet } from '../utils'
   import TxViewTx from './TxViewTx.svelte'
   import Edit from './icons/Edit.svelte'
   import { tick } from 'svelte'
@@ -61,7 +61,8 @@
   let modelIcon: Asset | undefined = undefined
   let iconComponent: AnyComponent | undefined = undefined
 
-  let edit = false
+  let edit: boolean = false
+  let showDiff: boolean = false
 
   $: if (tx.tx._id !== ptx?.tx._id) {
     if (tx.tx.modifiedBy !== account?._id) {
@@ -266,9 +267,9 @@
                 {:else}
                   <span class="lower"><Label label={activity.string.Changed} /></span>
                   <span class="lower"><Label label={m.label} /></span>
-                  <span class="lower"><Label label={activity.string.To} /></span>
 
                   {#if !hasMessageType}
+                    <span class="lower"><Label label={activity.string.To} /></span>
                     <span class="strong overflow-label">
                       {#if value.isObjectSet}
                         <ObjectPresenter value={value.set} inline />
@@ -276,6 +277,11 @@
                         <svelte:component this={m.presenter} value={value.set} inline />
                       {/if}
                     </span>
+                  {:else}
+                    <!-- svelte-ignore a11y-click-events-have-key-events -->
+                    <span class="show-diff" on:click={() => (showDiff = !showDiff)}>
+                      <Label label={showDiff ? ui.string.ShowLess : ui.string.ShowMore} />
+                    </span>
                   {/if}
                 {/if}
               {/await}
@@ -346,11 +352,18 @@
       {:else if hasMessageType && model.length > 0 && (tx.updateTx || tx.mixinTx)}
         {#await getValue(client, model[0], tx) then value}
           <div class="activity-content content" class:indent={isAttached} class:contentHidden>
-            <ShowMore ignore={edit}>
+            <ShowMore ignore={edit || showDiff}>
               {#if value.isObjectSet}
                 <ObjectPresenter value={value.set} inline />
-              {:else}
-                <svelte:component this={model[0].presenter} value={value.set} inline />
+              {:else if showDiff}
+                <svelte:component
+                  this={model[0].presenter}
+                  value={value.set}
+                  inline
+                  prevValue
+                  compareValue={getPrevValue(client, model[0], tx)}
+                  showOnlyDiff
+                />
               {/if}
             </ShowMore>
           </div>
@@ -511,4 +524,15 @@
       margin-top: 0.5rem;
     }
   }
+
+  .show-diff {
+    color: var(--accent-color);
+    cursor: pointer;
+    &:hover {
+      color: var(--caption-color);
+    }
+    &:active {
+      color: var(--accent-color);
+    }
+  }
 </style>
diff --git a/plugins/activity-resources/src/utils.ts b/plugins/activity-resources/src/utils.ts
index 2a491b525f..54e167a7c4 100644
--- a/plugins/activity-resources/src/utils.ts
+++ b/plugins/activity-resources/src/utils.ts
@@ -2,8 +2,11 @@ import type { DisplayTx, TxViewlet } from '@hcengineering/activity'
 import core, {
   AttachedDoc,
   Class,
+  Client,
   Collection,
   Doc,
+  getObjectValue,
+  Obj,
   Ref,
   TxCollectionCUD,
   TxCreateDoc,
@@ -13,12 +16,13 @@ import core, {
   TxProcessor,
   TxUpdateDoc
 } from '@hcengineering/core'
-import { Asset, IntlString, translate } from '@hcengineering/platform'
-import { AnyComponent, AnySvelteComponent } from '@hcengineering/ui'
-import { AttributeModel } from '@hcengineering/view'
-import { buildModel, getObjectPresenter } from '@hcengineering/view-resources'
+import { Asset, IntlString, getResource, translate } from '@hcengineering/platform'
+import { AnyComponent, AnySvelteComponent, ErrorPresenter } from '@hcengineering/ui'
+import view, { AttributeModel, BuildModelKey, BuildModelOptions } from '@hcengineering/view'
+import { getObjectPresenter } from '@hcengineering/view-resources'
 import { ActivityKey, activityKey } from './activity'
 import activity from './plugin'
+import { getAttributePresenterClass } from '@hcengineering/presentation'
 
 const valueTypes: ReadonlyArray<Ref<Class<Doc>>> = [
   core.class.TypeString,
@@ -150,6 +154,77 @@ async function checkInlineViewlets (
   return { viewlet, model }
 }
 
+async function getAttributePresenter (
+  client: Client,
+  _class: Ref<Class<Obj>>,
+  key: string,
+  preserveKey: BuildModelKey
+): Promise<AttributeModel> {
+  const hierarchy = client.getHierarchy()
+  const attribute = hierarchy.getAttribute(_class, key)
+  const presenterClass = getAttributePresenterClass(hierarchy, attribute)
+  const isCollectionAttr = presenterClass.category === 'collection'
+  const mixin = isCollectionAttr ? view.mixin.CollectionPresenter : view.mixin.ActivityAttributePresenter
+  let presenterMixin = hierarchy.classHierarchyMixin(presenterClass.attrClass, mixin)
+  if (presenterMixin?.presenter === undefined && mixin === view.mixin.ActivityAttributePresenter) {
+    presenterMixin = hierarchy.classHierarchyMixin(presenterClass.attrClass, view.mixin.AttributePresenter)
+    if (presenterMixin?.presenter === undefined) {
+      throw new Error('attribute presenter not found for ' + JSON.stringify(preserveKey))
+    }
+  } else if (presenterMixin?.presenter === undefined) {
+    throw new Error('attribute presenter not found for ' + JSON.stringify(preserveKey))
+  }
+  const resultKey = preserveKey.sortingKey ?? preserveKey.key
+  const sortingKey = Array.isArray(resultKey)
+    ? resultKey
+    : attribute.type._class === core.class.ArrOf
+      ? resultKey + '.length'
+      : resultKey
+  const presenter = await getResource(presenterMixin.presenter)
+
+  return {
+    key: preserveKey.key,
+    sortingKey,
+    _class: presenterClass.attrClass,
+    label: preserveKey.label ?? attribute.shortLabel ?? attribute.label,
+    presenter,
+    props: preserveKey.props,
+    icon: presenterMixin.icon,
+    attribute,
+    collectionAttr: isCollectionAttr,
+    isLookup: false
+  }
+}
+
+async function buildModel (options: BuildModelOptions): Promise<AttributeModel[]> {
+  // eslint-disable-next-line array-callback-return
+  const model = options.keys
+    .map((key) => (typeof key === 'string' ? { key } : key))
+    .map(async (key) => {
+      try {
+        return await getAttributePresenter(options.client, options._class, key.key, key)
+      } catch (err: any) {
+        if (options.ignoreMissing ?? false) {
+          return undefined
+        }
+        const stringKey = key.label ?? key.key
+        console.error('Failed to find presenter for', key, err)
+        const errorPresenter: AttributeModel = {
+          key: '',
+          sortingKey: '',
+          presenter: ErrorPresenter,
+          label: stringKey as IntlString,
+          _class: core.class.TypeString,
+          props: { error: err },
+          collectionAttr: false,
+          isLookup: false
+        }
+        return errorPresenter
+      }
+    })
+  return (await Promise.all(model)).filter((a) => a !== undefined) as AttributeModel[]
+}
+
 async function createUpdateModel (
   dtx: DisplayTx,
   client: TxOperations,
@@ -301,6 +376,13 @@ export async function getValue (client: TxOperations, m: AttributeModel, tx: Dis
   return value
 }
 
+export function getPrevValue (client: TxOperations, m: AttributeModel, tx: DisplayTx): any {
+  if (tx.prevDoc !== undefined) {
+    return getObjectValue(m.key, tx.prevDoc)
+  }
+  return undefined
+}
+
 export function filterCollectionTxes (txes: DisplayTx[]): DisplayTx[] {
   return txes.map(filterCollectionTx).filter(Boolean) as DisplayTx[]
 }
diff --git a/plugins/activity/src/index.ts b/plugins/activity/src/index.ts
index 739e39e3ce..cec29a6efa 100644
--- a/plugins/activity/src/index.ts
+++ b/plugins/activity/src/index.ts
@@ -84,6 +84,8 @@ export interface DisplayTx {
 
   // Document in case it is required.
   doc?: Doc
+  // Previous document in case it is required.
+  prevDoc?: Doc
 
   updated: boolean
   mixin: boolean
diff --git a/plugins/view-resources/src/components/MarkupDiffPresenter.svelte b/plugins/view-resources/src/components/MarkupDiffPresenter.svelte
new file mode 100644
index 0000000000..4ad5da6f22
--- /dev/null
+++ b/plugins/view-resources/src/components/MarkupDiffPresenter.svelte
@@ -0,0 +1,49 @@
+<!--
+// Copyright © 2023 Anticrm Platform Contributors.
+// Copyright © 2023 Hardcore Engineering Inc.
+// 
+// Licensed under the Eclipse Public License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License. You may
+// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// 
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+<script lang="ts">
+  import { CollaborationDiffViewer } from '@hcengineering/text-editor'
+  import { ShowMore } from '@hcengineering/ui'
+
+  export let value: string | undefined
+  export let compareValue: string | undefined = undefined
+  export let showOnlyDiff: boolean = false
+
+  function removeSimilarLines (str1: string | undefined, str2: string | undefined) {
+    if (str1 === undefined || str2 === undefined) {
+      return
+    }
+    const lines1 = str1.split('</p>')
+    const lines2 = str2.split('</p>')
+    let result1 = ''
+    let result2 = ''
+    for (let i = 0; i < lines1.length; i++) {
+      if (lines1[i] !== lines2[i]) {
+        result1 += lines1[i] ?? '' + '</p>'
+        result2 += lines2[i] ?? '' + '</p>'
+      }
+    }
+    value = result1
+    compareValue = result2
+  }
+
+  $: showOnlyDiff && removeSimilarLines(value, compareValue)
+</script>
+
+<ShowMore>
+  {#key [value, compareValue]}
+    <CollaborationDiffViewer content={value ?? ''} comparedVersion={compareValue} noButton readonly />
+  {/key}
+</ShowMore>
diff --git a/plugins/view-resources/src/index.ts b/plugins/view-resources/src/index.ts
index b0f0715b6a..8e62e2263f 100644
--- a/plugins/view-resources/src/index.ts
+++ b/plugins/view-resources/src/index.ts
@@ -49,6 +49,7 @@ import DividerPresenter from './components/list/DividerPresenter.svelte'
 import ListView from './components/list/ListView.svelte'
 import SortableList from './components/list/SortableList.svelte'
 import SortableListItem from './components/list/SortableListItem.svelte'
+import MarkupDiffPresenter from './components/MarkupDiffPresenter.svelte'
 import MarkupEditor from './components/MarkupEditor.svelte'
 import MarkupEditorPopup from './components/MarkupEditorPopup.svelte'
 import MarkupPresenter from './components/MarkupPresenter.svelte'
@@ -94,6 +95,7 @@ export { default as FixedColumn } from './components/FixedColumn.svelte'
 export { default as SourcePresenter } from './components/inference/SourcePresenter.svelte'
 export { default as LinkPresenter } from './components/LinkPresenter.svelte'
 export { default as List } from './components/list/List.svelte'
+export { default as MarkupDiffPresenter } from './components/MarkupDiffPresenter.svelte'
 export { default as MarkupPresenter } from './components/MarkupPresenter.svelte'
 export { default as MarkupPreviewPopup } from './components/MarkupPreviewPopup.svelte'
 export { default as ContextMenu } from './components/Menu.svelte'
@@ -189,6 +191,7 @@ export default async (): Promise<Resources> => ({
     ActionsPopup,
     StringEditorPopup: EditBoxPopup,
     MarkupPresenter,
+    MarkupDiffPresenter,
     MarkupEditor,
     MarkupEditorPopup,
     BooleanTruePresenter,
diff --git a/plugins/view/src/index.ts b/plugins/view/src/index.ts
index baf6daefb2..3147f1e89a 100644
--- a/plugins/view/src/index.ts
+++ b/plugins/view/src/index.ts
@@ -159,6 +159,13 @@ export interface AttributePresenter extends Class<Doc> {
   presenter: AnyComponent
 }
 
+/**
+ * @public
+ */
+export interface ActivityAttributePresenter extends Class<Doc> {
+  presenter: AnyComponent
+}
+
 /**
  * @public
  */
@@ -603,6 +610,7 @@ const view = plugin(viewId, {
     InlineAttributEditor: '' as Ref<Mixin<InlineAttributEditor>>,
     ArrayEditor: '' as Ref<Mixin<ArrayEditor>>,
     AttributePresenter: '' as Ref<Mixin<AttributePresenter>>,
+    ActivityAttributePresenter: '' as Ref<Mixin<ActivityAttributePresenter>>,
     ListItemPresenter: '' as Ref<Mixin<ListItemPresenter>>,
     ObjectEditor: '' as Ref<Mixin<ObjectEditor>>,
     ObjectPresenter: '' as Ref<Mixin<ObjectPresenter>>,