Excel Review Tab Explained: Proofing, Comments & Protection

What You'll Be Able to Do, and What to Have Open Before You Explore the Excel Review Tab

The client email came in at 4:52 PM on a Friday. "There's a typo on page three of the report." I pulled up the file, and sure enough: "Januray," sitting right there in a cell I'd looked at a dozen times that week. That's the moment the excel review tab went from something I knew existed to something I actually used. One F7 keystroke, thirty seconds, problem solved before end of business. If you're building workbooks that other people read, share, or edit, the Review tab in Microsoft Excel is the one ribbon section that protects your work before it leaves your hands. Open a workbook now (something with real data in it) and follow along. This guide covers proofing, collaboration via comments and notes, and workbook protection, including the differences between Microsoft 365 and older Excel builds that most tutorials skip entirely.

If you're newer to navigating the ribbon, the Excel Interface and Navigation Guide is worth a read first. The Review tab sits between the Data tab and View tab, so once you know your way around the ribbon, everything in this guide clicks faster.

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Step 1: Catch Errors Fast with Excel's Proofing Tools

Before anything else, before you share, before you protect, before you send, run Spell Check. Press F7. That's it. Excel's spell check scans every cell and flags anything it doesn't recognize. It's the same engine behind the rest of Microsoft Office, and it takes about ten seconds on a typical spreadsheet.

The Thesaurus (Shift+F7) is less glamorous but useful when you're labeling charts or headers and the wording feels off. I've used it more times than I'd like to admit on client-facing dashboards.

The one tool in the Proofing group that people consistently ignore is the Accessibility Checker. If your workbook is going anywhere outside your immediate team (a client, a board, a public portal), run it. It flags missing alt text, low contrast, and structural issues that affect screen readers. In 2026, that's not optional anymore for most professional environments.

Think of this whole step as your pre-flight check. Proofing first, then collaboration, then protection. In that order.

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Step 2: Add, Reply to, and Resolve Comments (Plus Why Notes Are Different)

Once your file is clean, the next thing you'll likely want to do is leave feedback or receive it. This is where a version difference trips up a lot of people, and I used to get it wrong too before I started testing across Excel 2016, 2019, and 365 explicitly.

Comments vs. Notes: The Version Trap I Used to Fall Into

In Microsoft 365, there are two distinct things: Comments (threaded, collaborative, designed for back-and-forth conversation) and Notes (the old yellow sticky-note style from legacy Excel). In Excel 2016 and earlier, what's now called a Note was called a Comment. Microsoft renamed and split them in later builds, which means if you're Googling "how to add comments in Excel spreadsheet" and following instructions from a 2015 tutorial, you might be inserting a Note when you actually want a Comment. In Excel for the Web, threaded Comments are the default, and Notes aren't even available in that interface.

To insert a threaded Comment in Excel 365, right-click a cell and choose New Comment, or go to Review → New Comment. You can @mention a teammate, reply to their reply, and mark the thread Resolved when the issue is closed. To show all comments at once, click Show Comments in the Review tab. It opens a side panel in 365 rather than floating boxes, which is a cleaner way to read a busy review thread.

Deleting is straightforward: select the cell, go to Review → Delete. Resolved threads disappear cleanly. Don't leave unresolved comment threads in a file you're handing off. I've inherited workbooks with 40 open comment threads from people who left the company. Not useful.

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Step 3: Track Changes and Protect Your Workbook Before Sharing

With comments handled, the next layer is controlling what can actually be changed, and by whom. The Review tab gives you two tools for this: Track Changes and workbook protection. They solve different problems.

How to Accept or Reject Changes in Excel

The excel track changes feature records every edit made to a workbook: who made it, when, and what the previous value was. To turn it on, go to Review → Track Changes → Highlight Changes. Check "Track changes while editing," set the scope (when, who, where), and click OK.

To review edits, go to Review → Track Changes → Accept/Reject Changes. Excel steps through each flagged change and gives you the option to accept or reject changes in Excel one at a time, or all at once. Changes you accept become permanent. Changes you reject revert.

If your team is co-authoring in a file saved to OneDrive, Track Changes behaves inconsistently. It's not designed for simultaneous multi-user editing. For that workflow, the threaded Comments from Step 2 are your better tool. Use Track Changes for asynchronous review of a file passed between people, not for live collaboration.

Protect Sheet vs. Protect Workbook: Which One You Actually Need

This is the distinction that catches most intermediate users. Protect Sheet locks the content and formatting of a single tab. Protect Workbook locks the file's architecture, meaning no adding, deleting, or renaming sheets.

For most shared workbooks, you want Protect Sheet. Go to Review → Protect Sheet, set a password (or don't, since passwordless protection still stops accidental edits), and choose what users can still do. The feature most tutorials skip here is Allow Users to Edit Ranges, which lives inside the Protect Sheet setup. It lets you unlock specific input cells while keeping formula cells locked. I use this on almost every shared workbook I build, because it creates a clean input interface without locking users out entirely. Pair it with data validation and you've got a workbook that guides users without requiring you to be present to explain it.

The best workbook is one someone else can use and maintain without calling you. Protection and annotation are how you make that happen.

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Common Mistakes When Using the Excel Review Tab (and How to Sidestep Them)

Three things come up constantly. First, confusing Comments with Notes in older Excel versions. If someone on your team is using Excel 2016 and you're on 365, your threaded Comments may not display the same way for them. Know your team's version before you build a comment-heavy review workflow around it.

Second, expecting Track Changes to work cleanly in a co-authored OneDrive file. It doesn't. Use Comments for live collaboration, Track Changes for sequential review.

Third, forgetting to unprotect a sheet before editing it yourself. You'll get a "The cell or chart you're trying to change is on a protected sheet" error, and if you set a password six months ago and didn't write it down, you're in real trouble.

Keep a secure record of any protection passwords. I keep mine in a password manager tied to the client project folder. Excel cannot recover a forgotten sheet password without third-party tools, and on newer file formats those don't always work.

The excel review tab is one of the few ribbon sections where a five-minute setup saves hours of cleanup later. These aren't features for IT departments. They're features for anyone who builds a file that someone else touches. If that's you, this is the tab worth knowing.

For a broader look at how these tools fit into Excel's full ribbon structure, the Excel for Beginners: Complete Starter Guide covers the whole picture. And if you want to go deeper on the ribbon itself, the Understanding the Excel Ribbon Tabs and Groups guide is a solid next step.

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