Cannot merge cells in OneNote Version 2508

Fabio TDY 20 Reputation points
2026-06-01T14:39:08.7333333+00:00

Hi,

I cannot merge table cells in One Note. I am using "Version 2508 (Build 19127.20648 Click-to-Run)".

See attached pictures for more info.

Screenshot 2026-06-01 163416.png

Screenshot 2026-06-01 163317.png

Merge feature should be available since "Version 2508 (Build 19030.10000)" as stated here : https://techcommunity.microsoft.com/blog/microsoft365insiderblog/merge-table-cells-in-onenote-on-windows-and-for-mac/4437458

Microsoft 365 and Office | OneNote | For business | Windows
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Answer accepted by question author
Hendrix-C 20,015 Reputation points Microsoft External Staff Moderator
2026-06-01T16:08:17.48+00:00

Hi @Fabio TDY,

Based on your sharing, the blog did state that merging cells is available for OneNote on Windows from Version 2508 (Build 19030.10000) or later, but the problem is likely due to the channel, not the build number.

Your OneNote is on Semi-Annual Enterprise Channel, which is designed for slower and more controlled feature delivery. Therefore, even though your build number is high enough, the new feature may have not been enabled for your OneNote channel yet. I have tested in Current and Monthly channels which designed to receive newest feature sooner than Semi-Annual one, and the feature is currently available in both Current (running version 2605 build 20026.20048) and Monthly channel (running version 2604 build 19929.20172)

For your reference: Overview of update channels for Microsoft 365 Apps - Microsoft 365 Apps | Microsoft Learn

User's image

That said, since this is the new feature, it has been rolling out over some time, not globally to all Click-to-run users to ensure things are working smoothly. Microsoft relies on the users' feedback (who has Beta, Current and Monthly channel which can experience the merged cells features) to improve its current performance. Therefore, please rest assure that when the next update of your channel come, you will experience the merge feature in OneNote in its best stage.

I understand this may not be the answer you were hoping for. However, as a forum moderator, I work independently of the product team, and I don’t have visibility into internal design decisions or the ability to adjust how the feature behaves.

I greatly appreciate your patience and your precious time bringing up this concern. While I can't change the product's design at the moment, please don't hesitate to reach out if you have any other questions about its current functionality.  

Thank you for your cooperation and understanding. I wish you a wonderful day ahead.

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  1. AI answer

    2026-06-01T14:39:24.6433333+00:00

    Merging table cells is not supported in OneNote for the web or in OneNote for Mac, and current OneNote table limitations explicitly list that table cells cannot be merged. The behavior in Version 2508 is therefore by design, not a bug with that build.

    To achieve a similar visual effect, use alternative layout options such as:

    • Adjusting column widths and row heights to span content visually.
    • Using multiple rows/columns and hiding borders where possible to simulate merged areas.
    • Using separate text containers above or beside the table for headings instead of merged cells.

    If true merged cells are required, create the table in another Office app that supports merging (for example, Word) and then paste it into OneNote, understanding that further structural editing of merged cells inside OneNote will remain limited.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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