Why Word’s Revision Marks for Formatting Changes Render Inconsistently

You apply formatting changes in Word and enable Track Changes, but the revision marks do not appear the same way for every formatting modification. Some changes show a strikethrough and underline, while others only show a vertical line in the margin or no visible mark at all. This inconsistency stems from how Word categorizes formatting changes into separate tracking methods. This article explains the two distinct tracking modes for formatting, why they behave differently, and how to configure Word to show each type of formatting revision the way you need.

Why Formatting Revision Marks Look Different for Different Changes

Word uses two distinct methods to represent formatting changes in Track Changes. The first method is the traditional strikethrough-and-underline approach, where deleted formatting text appears with a strikethrough and added formatting text appears with an underline. The second method uses a vertical line in the left margin, called a changed line or revision bar, to indicate that formatting was modified but does not show the old and new formatting inline. The method Word chooses depends on the type of formatting change and the version of Word you use.

Inline Formatting Marks for Character-Level Changes

When you change character-level formatting such as font name, font size, bold, italic, underline, or font color on selected text, Word typically uses inline revision marks. The old formatting text is shown with a strikethrough, and the new formatting text is shown with an underline. This behavior occurs because Word treats the formatting as an attribute of the characters themselves, so it can display the exact before-and-after state. This is the most straightforward and expected behavior for most users.

Balloon or Changed Line for Paragraph-Level Changes

When you change paragraph-level formatting such as alignment, line spacing, indentation, paragraph spacing before or after, or borders, Word often uses a changed line instead of inline marks. The reason is that paragraph formatting applies to the entire paragraph, not to individual characters. Showing a strikethrough of the old paragraph formatting and an underline of the new formatting would be confusing because the formatting does not apply to specific characters. Instead, Word places a vertical line in the left margin next to the affected paragraph. In some Word versions, the change appears in a balloon in the markup area. This difference in representation is the primary cause of inconsistency users observe.

Mixed Behavior in Some Word Versions

Word 2013 and later versions introduced a unified tracking mode called Simple Markup. When Simple Markup is active, all formatting changes, both character and paragraph, show only a red vertical line in the left margin. No inline strikethrough or underline appears. This setting overrides the traditional behavior and makes formatting changes appear identical regardless of the type of formatting changed. If you switch between Simple Markup and All Markup, you will see different representations for the same formatting change. This version-specific behavior adds another layer of inconsistency.

How to Control Which Formatting Revision Marks Appear

You can adjust several settings to make formatting revision marks display consistently according to your preference. The following steps cover the most common configurations.

Enable or Disable Tracking of Formatting Changes

1. Open the Change Tracking Options dialog
   Go to Review > Track Changes > Change Tracking Options. This opens a dialog where you can control which types of changes are tracked.
2. Check or uncheck Track formatting
   In the dialog, locate the Formatting checkbox under the Track Changes section. Check it to track formatting changes. Uncheck it to stop tracking formatting. Click OK.
3. Verify that formatting changes now appear or disappear
   After you change this setting, any new formatting changes will be tracked or ignored. Existing tracked formatting changes remain visible unless you accept or reject them.

Switch Between Simple Markup and All Markup

1. Locate the markup display button
   On the Review tab, in the Tracking group, find the button that currently shows Simple Markup or All Markup. Click the arrow next to it to open the dropdown menu.
2. Select All Markup
   Choose All Markup from the dropdown. This forces Word to show all inline revision marks for character formatting and changed lines for paragraph formatting. Simple Markup hides inline details and shows only changed lines.
3. Select Simple Markup if you prefer minimal display
   If you want all formatting changes to appear only as a vertical line, choose Simple Markup. This eliminates the strikethrough-and-underline display for character formatting changes.

Show or Hide Formatting Markup in Balloons

1. Open the Show Markup menu
   On the Review tab, click Show Markup. A list of change types appears.
2. Check or uncheck Formatting
   If Formatting is unchecked, no formatting revision marks appear at all, even if Track Changes is on. Check it to display formatting marks. This setting applies to both inline and balloon display.
3. Choose Balloons or Inline
   Click Balloons in the Tracking group and select Show Revisions in Balloons to move all formatting changes to the right margin. Select Show All Revisions Inline to display formatting changes inside the document text. Balloons can make paragraph formatting changes more visible.

Common Scenarios Where Formatting Marks Still Look Wrong

Formatting Changes on Pasted Content Do Not Show Revision Marks

When you paste content from another source, Word may adjust the formatting automatically using the smart cut and paste feature. This adjustment can create hidden formatting changes that do not appear as tracked changes. To fix this, go to File > Options > Advanced > Cut, copy, and paste. Click Settings under Use smart cut and paste. Uncheck Adjust formatting when pasting. Then paste the content again. The formatting changes will now appear as tracked changes if Track Changes is on.

Formatting Changes to Styles Do Not Show Individual Revision Marks

If you modify a style, such as changing the font of the Normal style, Word does not show revision marks for each paragraph that uses that style. Instead, it shows one revision mark at the point where the style definition changed. To see the effect on each paragraph, you must apply the style again after the style definition change. Word then tracks the reapplication as a formatting change on each paragraph.

Track Changes Is On but No Formatting Marks Appear

This situation occurs when the Formatting option under Show Markup is turned off. Go to Review > Show Markup and ensure Formatting is checked. Also check that Simple Markup is not hiding the inline details. Switch to All Markup to confirm.

Word Markup Display Modes vs Formatting Revision Visibility

Item	Simple Markup	All Markup
Character formatting change display	Red vertical line only	Strikethrough old text, underline new text
Paragraph formatting change display	Red vertical line only	Red vertical line or balloon
Balloon usage for formatting	Not used	Depends on Balloons setting
Visibility of formatting in print	Vertical line prints	Inline marks and vertical line print

You can now identify why formatting revision marks appear differently for different changes and how to control each setting. Start by setting the markup display to All Markup and enabling Formatting under Show Markup. For advanced control, adjust the Balloons setting to move paragraph formatting changes into the margin where they are easier to see. If you collaborate with others who use older Word versions, consider sending the document with All Markup selected so inline formatting changes remain visible.