Fix Word Lagging on Scroll Through Documents With Many Tracked Changes

Scrolling through a Word document that has hundreds or thousands of tracked changes can become painfully slow. The application freezes for several seconds each time you move the scroll bar or press Page Down. This lag occurs because Word must redraw every change indicator, including insertion balloons, deletion strikethroughs, and formatting marks, each time the viewport moves. This article explains why heavy tracked changes cause scrolling lag and provides four proven methods to restore smooth navigation.

Why Tracked Changes Cause Scrolling Lag in Word

When you enable Track Changes, Word stores every edit as a revision object. Each revision contains the original text, the new text, the author name, a timestamp, and formatting metadata. As you scroll, Word must calculate and redraw every visible revision marker in real time.

The redraw process includes:

• Insertions shown as underlined colored text
• Deletions shown as strikethrough text or in balloons
• Formatting changes marked with change bars in the margin
• Comment icons and comment balloons for each annotation

A document with more than 500 tracked changes can cause Word to use over 1 GB of RAM just for the markup rendering. When you scroll, the CPU and GPU must process all these elements simultaneously. On systems with integrated graphics or limited RAM, the lag becomes severe.

Additional Factors That Worsen Scrolling Performance

Several document characteristics amplify the lag:

• Large embedded images that must be redrawn alongside revision marks
• Complex tables with merged cells and tracked formatting changes
• Many comment threads attached to the same paragraph
• Third-party add-ins that hook into the scrolling event

Steps to Restore Smooth Scrolling in Documents With Tracked Changes

The following methods are ordered from least intrusive to most permanent. Try Method 1 first before moving to the others.

Method 1: Switch to No Markup View Temporarily

1. Open the Review tab
   In the ribbon, click the Review tab to access the tracking tools.
2. Change the Display for Review dropdown
   In the Tracking group, locate the Display for Review dropdown. It shows All Markup by default. Click the arrow and select No Markup.
3. Scroll through the document
   The document now shows the final text without any revision marks. Scrolling will be much faster because Word does not need to render any tracked changes.
4. Switch back to All Markup when needed
   When you need to see the changes again, return to the dropdown and select All Markup. This method does not remove any data; it only hides the visual indicators.

Method 2: Open the Reviewing Pane

The reviewing pane displays all tracked changes in a separate panel. When this pane is open, Word offloads some of the markup rendering from the main document view, which can reduce scrolling lag.

1. Go to the Review tab
   Click Review in the ribbon.
2. Click Reviewing Pane
   In the Tracking group, click Reviewing Pane. Select either Reviewing Pane Vertical or Reviewing Pane Horizontal. The vertical pane appears on the left side of the document window. The horizontal pane appears at the bottom.
3. Scroll through the document
   With the reviewing pane open, scroll through the document. The main view may still show some markup, but the rendering load is reduced because the pane handles the detailed list.

Method 3: Disable Hardware Graphics Acceleration

Word uses your computer GPU to render document content. On systems with older or incompatible graphics drivers, GPU acceleration causes stuttering when scrolling documents with many tracked changes. Disabling this feature forces Word to use the CPU for rendering, which is often more stable.

1. Open Word Options
   Click File > Options.
2. Go to the Advanced category
   In the Word Options dialog, click Advanced on the left sidebar.
3. Scroll to the Display section
   Scroll down to the Display section. It is near the top of the Advanced options list.
4. Check Disable hardware graphics acceleration
   Check the box labeled Disable hardware graphics acceleration.
5. Restart Word
   Click OK to close the dialog, then close and reopen Word. Open the document again and test scrolling performance.

Method 4: Accept All Changes and Turn Off Track Changes

If the tracked changes are no longer needed for review, accepting all changes removes the markup data entirely. This is the most effective fix because it eliminates the root cause of the lag.

1. Click the Review tab
   Open the Review tab in the ribbon.
2. Click the arrow below Accept
   In the Changes group, click the small arrow below the Accept button to expand the menu.
3. Select Accept All Changes
   From the dropdown, choose Accept All Changes. Word applies all revisions to the document text and removes the markup.
4. Turn off Track Changes
   In the Tracking group, click Track Changes to toggle it off. The button should appear unhighlighted.
5. Save the document
   Press Ctrl+S to save the cleaned version. Scrolling will now be as fast as a normal document.

If Word Still Has Issues After the Main Fix

Word Freezes When Updating a Large Table of Contents

If the document contains a table of contents that references many headings with tracked changes, updating the TOC can also cause lag. To fix this, temporarily hide tracked changes using the No Markup view before updating the TOC. Right-click the TOC and select Update Field, then choose Update page numbers only to minimize processing.

Scrolling Still Slow After Disabling Hardware Acceleration

Some users find that disabling hardware acceleration does not help because the CPU itself is the bottleneck. In this case, close all other applications to free up system resources. Also check whether a third-party PDF or grammar add-in is running. Disable add-ins by going to File > Options > Add-ins, select COM Add-ins in the Manage dropdown, click Go, and uncheck any non-Microsoft add-ins.

Track Changes Not Visible After Switching to No Markup

If you switch to No Markup and the changes disappear, that is expected. To see the changes again, switch back to All Markup. If the changes do not reappear, the document may have been inadvertently saved without markup. Check the Display for Review dropdown to confirm it is set to All Markup. If it is, the changes were already accepted or rejected in a previous session.

Word Online vs Desktop: Scrolling Performance With Tracked Changes

Item	Word Desktop	Word Online
Rendering engine	Local GPU and CPU	Server-side rendering in browser
Scroll lag with 500+ changes	Frequent stuttering, especially with images	Minimal lag, but requires stable internet
No Markup view available	Yes, in Display for Review dropdown	Yes, in Review > Show Markup toggle
Hardware acceleration control	File > Options > Advanced	Not applicable
Accept All Changes	One click in Review tab	One click in Review tab

Word Online renders the document on Microsoft servers and streams only the visible portion to your browser. This reduces the rendering load on your local machine, so scrolling through tracked changes is often smoother. However, you need a reliable internet connection, and you cannot disable hardware acceleration because the browser manages that separately.

For documents with more than 2000 tracked changes, consider using Word Online temporarily for navigation, then switch back to the desktop app for editing and final acceptance.