“You can combine two or more table cells in the same row or column into a single cell.” That is the whole of Microsoft’s definition.
If Merge Cells is missing, check first that the cells touch: that is the one reason Microsoft gives.
Docs · guide
How to merge cells in Word, and why the button sometimes is not there
By Alberto Gulotta · Updated · 12 min read
To merge cells in Word, click inside the table, select two or more cells that touch, and choose Table Layout › Merge Cells. Right-clicking the selection offers the same command. If Merge Cells is missing, Microsoft gives the reason in one line: the cells have to be adjacent.
| What you have selected | Is Merge Cells offered? | Microsoft’s own sentence |
|---|---|---|
| One cell | No | “make sure you selected multiple adjacent cells” |
| Two cells side by side in a row | Yes | “two or more table cells in the same row or column” |
| Two cells stacked in a column | Yes | The same sentence covers both directions |
| Two cells that do not touch | No | “multiple adjacent cells”, again |
| A table in Word for the web | It may not be | The page is written for “the desktop versions of Word” |
“Why can’t I merge cells in Word?” is the first of the four questions Google printed under the results on 25 September 2026, and Microsoft answers it twice on one page, in identical words under the Windows steps and under the Mac steps: “If you don’t see Merge Cells, make sure you selected multiple adjacent cells.” Adjacent is doing the work in that sentence, and the definition above it says the same: “two or more table cells in the same row or column”.
- Click inside the table first. The tab you need does not exist until you do: Word only shows Table Layout while the cursor is in a table, which is also why a shortcut that goes through that tab fails when you are somewhere else.
- Select two or more cells that touch. Microsoft’s wording is exact: “You can combine two or more table cells in the same row or column into a single cell.” Drag across them, or click the first and Shift-click the last.
- Choose Table Layout › Merge Cells. That is the whole command. If the button is not there, Microsoft names the reason: “If you don’t see Merge Cells, make sure you selected multiple adjacent cells.”
- Or right-click the selection. “You can also right‑click the selected cells and select Merge Cells.” Same command, one fewer trip to the ribbon.
- To take it back, use Unmerge Cells, not Split Cells. “To unmerge cells, select the cells, then select Unmerge Cells.” The two commands do different things.
- If the table has gone invisible, turn the gridlines on. Microsoft: “If your table doesn’t have borders, you can turn on gridlines. Select anywhere in the table, then on the Layout tab next to the Table Design tab, choose View Gridlines.”
Unmerge puts back the cells that were joined. Split asks a question instead: “Enter the number of columns or rows to split the selected cell into.”
So Split on a cell that was never merged still works, and gives you a grid that was not there before.
The note sits above both sets of steps: “This content applies to the desktop versions of Word. Some table features may not be available in Word for the web or mobile apps.”
The scope line underneath names eight desktop versions, Windows and Mac, from Word 2016 onwards.
The shortcut wikiHow prints, and the page it is credited to
“Alternatively, use the keyboard shortcut Alt + A, Alt + M.”
That is wikiHow, and its footnote 4 credits the claim to Microsoft’s own “Keyboard shortcuts in Word”. We opened that page on 25 September 2026 and counted: over 10,000 words, and the word “merge” appears nine times — all nine about mail merge. Its “Work with tables” section lists Tab, Shift+Tab, Alt+Home, Alt+End, Alt+Page up, Alt+Page down and the arrow keys. There is no merge entry, on the Windows list or the Mac one. Microsoft’s page about merging cells does not contain the word “shortcut” at all.
That does not make the key sequence wrong. The same shortcut page describes two kinds of Alt sequence that could explain it: ribbon Access Keys — “For various ribbon options you can combine the Key Tips letters with the Alt key to make shortcuts called Access Keys” — and the menus of older versions: “most of the old Alt key menu shortcuts still work, too. However, you need to know the full shortcut.” Neither description names this sequence, so whether it works on your copy is something to try, not something Microsoft promises.
One more line from the same section matters here: “Additional tabs might appear depending on your selection in the document.” Table Layout is one of those tabs, which is why Microsoft’s route starts with the cursor inside the table.
Unmerge Cells and Split Cells are two commands, not two names for one. Unmerge gives back the cells that were joined. Split starts from a question — “Enter the number of columns or rows to split the selected cell into, then select OK” — and it will divide a cell that was never merged in the first place.
Five sentences from Microsoft, and what each one settles
All read in full on 25 September 2026, on the two Microsoft pages under Sources.
- Why the button is missing
- “If you don’t see Merge Cells, make sure you selected multiple adjacent cells.” Microsoft prints this twice, once under the Windows steps and once under the macOS ones.
- What a merge can join
- “You can combine two or more table cells in the same row or column into a single cell.”
- How to undo it later
- “To unmerge cells, select the cells, then select Unmerge Cells.” Not Split Cells, which asks how many pieces you want and will happily cut a cell that was never merged.
- Where this answer stops
- “This content applies to the desktop versions of Word. Some table features may not be available in Word for the web or mobile apps.” The scope line covers Word for Microsoft 365, 2024, 2021, 2019 and 2016, on Windows and on the Mac.
- What an Alt sequence really is
- “For various ribbon options you can combine the Key Tips letters with the Alt key to make shortcuts called Access Keys” — and “additional tabs might appear depending on your selection in the document”.
Where this answer stops. Microsoft puts the same note above both sets of steps: “This content applies to the desktop versions of Word. Some table features may not be available in Word for the web or mobile apps.” The scope line under the title names Word for Microsoft 365 and its Mac version, Word 2024 and its Mac version, Word 2021 and its Mac version, Word 2019 and Word 2016. That is eight desktop products and no browser, which is worth knowing before you go hunting for the button in a browser.
Where to start
Four ways in.
- “Just show me the command.”
- Six steps, and the tab that appears — when word offers merge cells
- “The button is greyed out.”
- Adjacent cells only — adjacent cells only
- “Is there a keyboard shortcut?”
- Not in Microsoft’s list — the shortcut wikihow prints
- “How do I put it back?”
- Unmerge, which is not Split — unmerge cells and split cells
When Word offers Merge Cells
Two or more cells, touching, in the same row or column — and a Table Layout tab that only exists while the cursor is inside the table.
LabelsThe product number on the box is the only setting that matters, plus the test print Microsoft mentions last.Open this guide →
Fillable formsThe last step is the one that matters: without it, whoever fills the form in can also rewrite it.Open this guide →
Table of contentsWord builds it from your headings — which is why it is empty when nobody marked them.Open this guide →
Adjacent cells only
Microsoft answers “why can’t I merge cells” twice on one page, in the same words, and the word doing the work is adjacent.
ColumnsText flows from one column into the next — which decides whether you want columns at all or a table.Open this guide →
MarginsThe default is already one inch, and why a wider left margin is the wrong fix for binding.Open this guide →
Double spacingTwo routes from Microsoft, and the paragraph setting that makes a correctly spaced document still fail.Open this guide →
The shortcut wikiHow prints
Microsoft’s shortcut list for Word, read on 25 September 2026, runs to over 10,000 words and mentions merge nine times, every one of them about mail merge.
Merging cells in ExcelMicrosoft says merging deletes the other cells — and there is a different command for what was meant.Open this guide →
Merging cells in Google SheetsGoogle’s own list of keyboard shortcuts for Sheets does not contain the word merge. Here is what it does contain.Open this guide →
Page breaksCtrl and Enter is real, and Microsoft publishes it on a different page from the one that teaches the break.Open this guide →
Unmerge Cells and Split Cells
One gives back the cells that were joined; the other asks how many pieces you want, and will cut a cell that was never merged.
Deleting a pageA page is not an object, which is why clicking on it and pressing Delete does nothing.Open this guide →
CheckboxesTwo things look like a checkbox and only one can be ticked on screen. Microsoft calls the other a print only list.Open this guide →
Combining documentsThe built-in feature hidden behind a small arrow, and the command that sounds right and is not.Open this guide →
Questions people also ask
Why can’t I merge cells in Word?
Microsoft’s reason, printed under both the Windows and the Mac steps: “If you don’t see Merge Cells, make sure you selected multiple adjacent cells.” The cells must touch.
What is the shortcut key for merge cell in Word?
Microsoft’s shortcut list does not carry one. Read on 25 September 2026 it runs to over 10,000 words and uses the word “merge” nine times, all about mail merge. The Alt sequence that circulates is not on it; the same page describes ribbon Access Keys and old Alt menu shortcuts without naming this one.
How to merge two cells into one?
Select both, then Table Layout › Merge Cells, or right-click the selection and choose Merge Cells. Microsoft: “You can combine two or more table cells in the same row or column into a single cell.”
How do I split one cell into two in Word?
Select the cell, then Table Layout › Split Cells, and “enter the number of columns or rows to split the selected cell into, then select OK”. That works on any cell, merged or not.
How do I undo a merge?
With Unmerge Cells, not Split Cells: “To unmerge cells, select the cells, then select Unmerge Cells.” The two commands do different jobs.
Can I merge cells in Word for the web?
The page that answers this question is not written for it. Microsoft’s note says the content “applies to the desktop versions of Word” and that some table features “may not be available in Word for the web or mobile apps”.
Not covered here. It does not cover merging cells in Word for the web or on a phone, which Microsoft’s page says it is not written for.
It does not cover what a merged cell does to a table that will later be sorted or converted to text.
And it does not cover tables pasted in from a spreadsheet, where the cells arrive already arranged. What holds instead is simple: the counts on this page were made on the day it names, on pages read from top to bottom, and a claim is credited to the page that carries it rather than to the page it points at.
Sources
- Microsoft Support — Merge or split cells in a table: the definition of a merge, the Table Layout route, the note that the command needs multiple adjacent cells, Unmerge Cells, Split Cells and View Gridlines. Applies to Word for Microsoft 365 and its Mac version, Word 2024 and its Mac version, Word 2021 and its Mac version, Word 2019 and Word 2016, and to the desktop versions only — support.microsoft.com, read September 2026.
- Microsoft Support — Keyboard shortcuts in Word: read in full on 25 September 2026 and counted here, over 10,000 words with nine uses of “merge”, all of them mail merge; the “Work with tables” list; and the description of Key Tips and Access Keys, including the note that additional tabs appear depending on the selection — support.microsoft.com, read September 2026.
- wikiHow — How to Merge Cells in Microsoft Word: 3 Simple Steps: the source of the Alt + A, Alt + M sequence quoted here, and of the Option + A, Option + M form for the Mac, which its footnote 4 credits to the Microsoft page above. Read in full with a browser on 25 September 2026, about 9,600 words, because the plain network response was a shell of fewer than fifty — www.wikihow.com, read September 2026.
Written by Alberto Gulotta
Founder and editor of AI Tools Primer, writing from Palermo, Italy. Thirty-five years of taking computers apart, starting with a Commodore 64 — the long version is on the about page.
Something wrong on this page? Write to aitoolsprimer@gmail.com and it gets fixed.
Written on 25 September 2026.
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