## Understand the views
| View | Purpose |
| --- | --- |
| Original | Check the earlier source document. |
| Modified | Check the revised source document. |
| Redline | Read the marked-up comparison. |
| Revision List | Select a difference and move to its location. |
| Comments | Review changes to document comments. |
Select a difference to move the document views to the relevant location. Use the
next and previous controls to work through the result. Use **Find** when you need
to locate a particular word or phrase.
Clicking a difference in the list or redline also selects the corresponding text
in **Original** and **Modified**. Replacements select both the old and new text;
moves select their source and destination. For a pure insertion or deletion, the
side without that text is positioned at the change boundary and its previous
selection is cleared. Next and previous difference navigation works the same way.
Scrolling **Redline** also scrolls **Original** and **Modified**. You can scroll
either source view independently without moving Redline or the other source view.
The status-bar **Page Mode** and **Draft Mode** buttons use the same commands
as the View menu and reflect the active comparison's layout. Selecting an
already active mode keeps that mode. Show or hide the Revision List through
**MarginDiff > Revision List**; it has no status-bar button.
## Interpret the change
Use the [Glossary](/docs/glossary) for change-type definitions. Identical visible
text can still have formatting differences. A comment change can concern its
text, author or date as well as its presence.
Colors and marks depend on your style profile. Read the change type rather than
assuming a particular color always has the same meaning.
Body text is compared within corresponding paragraphs. Unique matching words
help keep the comparison aligned, including when the text wraps
onto different display lines. A display-line wrap does not add a paragraph break
to the comparison report; replacement text stays within its source paragraph.
Regions without reliable anchors appear as deletions and insertions. These
regions can include repeated words that occur in both files. Unique matching
words remain anchors, including short words and numbers. Isolated word changes
remain detailed. Very different paragraphs may be shown as separate deletions
and insertions.
A detected move is inferred from the two files. Repeated or similar content can
make the match ambiguous; it is not an audit trail of the editing commands that
created the file. For table alignment and structural changes, see
[Table comparison](/docs/documents/options/#tables).
## Accept or reject a difference
The revision grid starts with **Accepted | No | Zone | Section**, followed by
the revision details. The **Accepted** checkbox is at the far left and controls
which changes are applied when saving a merged result.
Drag the divider beside the Revision List to resize it. Its size is remembered,
and it can grow to fill the available window space. Consecutive changes across
line breaks can share a row; selecting or accepting that row applies to all its
underlying edits while preserving line breaks in the document.
Use **Accept Difference** or **Reject Difference** when preparing a merged
result. Review the resulting text before exporting it. Source-file handling is described
in [Privacy](/docs/privacy/#keep-source-files-and-results-separate).
For a record of what changed, retain the redline or comparison package as well as
any merged document. See [Save and export](/docs/documents/save-export).
## Check before finishing
1. Confirm that the Original and Modified filenames are correct.
2. Confirm that the comparison profile includes the changes you intended to review.
3. Check important headings, tables, notes and comments in context.
4. Investigate conversion warnings or unexpected gaps.
5. Choose the appropriate [save or export output](/docs/documents/save-export).