Hello @JORGE MACHADO QUINTANILHA NETO,
Thank you for posting your question in the Microsoft Q&A forum.
In SharePoint 2025, some UI elements may be hidden or moved depending on your site's configuration or permissions. If you don’t see the Customize Welcome Page option:
- Make sure you're editing the parent Document Set content type, not just a list item.
- Confirm you have site collection admin permissions.
- Try accessing the settings via classic SharePoint view if available.
- Use the SharePoint Admin Center to manage content types centrally.
You can follow these steps to Customize the Document Set Welcome Page:
1.Go to Site Settings:
- Click the gear icon in SharePoint.
- Select Site Settings.
2.Access Site Content Types:
- Under Web Designer Galleries, click Site content types.
3.Select Your Document Set Content Type:
- Find and click the name of your custom Document Set content type.
4.Open Document Set Settings:
- Under Settings, click Document Set settings.
5.Customize the Welcome Page:
- In the Welcome Page section, click Customize the Welcome Page.
- This opens a Web Part page you can edit like any other SharePoint page.
6.Edit the Page:
- Use Edit Page from the Site Actions menu.
- Add or modify Web Parts:
- Document Set Properties Web Part: shows metadata.
- Document Set Contents Web Part: shows the documents inside the set.
- Document Set Properties Web Part: shows metadata.
7.Save and Apply Changes:
- After editing, return to the Document Set Settings page.
- Choose whether to update the Welcome Page for content types that inherit from this one.
- Click OK to save.
For your reference: Customize the Welcome Page for a Document Set
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