SharePoint Document Issues

How to Resize a Multiline Text Box in a Modern SharePoint List Form

Nimra MalikNimra Malik Nov 3, 2026 869 views

Question details

The user wants to create a wider and taller multiline field while applying a different column layout for other fields within a modern SharePoint list form.

How to Resize a Multiline Text Box in a Modern SharePoint List Form
Product
Microsoft SharePoint
Device & OS
not provided
Scenario
Customizing the layout of a modern SharePoint list form to adjust the specific dimensions of a multiline text input field.
Observed behavior
Modern SharePoint list forms have limited native layout customization for specific field widths and heights, requiring an alternative method to properly resize the input boxes.
Before you start

Ensure you have the necessary permissions to edit the SharePoint list and create Power Apps custom forms. You will also need an active Microsoft 365 subscription with Power Apps access enabled by your administrator.

Solution 1Recommended

Customize the SharePoint Form Using Power Apps

Since native JSON column formatting has limitations for specific field resizing, integrating Power Apps is the recommended method to adjust multiline text box dimensions freely.

Power Apps allows you to replace the standard SharePoint list form with a highly customizable canvas app form. This method gives you complete control over the layout, including individual field widths, heights, and multi-column designs.

1
Navigate to your SharePoint list

Open the modern SharePoint list where you want to customize the form layout and adjust the text box.

2
Launch Power Apps integration

Click on the 'Integrate' menu in the top command bar, select 'Power Apps,' and then choose 'Customize forms'.

3
Select the multiline text control

Once the Power Apps studio opens, click on the specific multiline text box data card within the form editor screen.

4
Adjust the dimensions

Drag the borders of the text box to make it wider and taller, or manually enter your desired 'Width' and 'Height' values in the right-side properties pane.

5
Save and publish

Click 'File,' save your newly customized form, and select 'Publish to SharePoint' to apply the dimension changes to your live list.

Customize the SharePoint Form Using Power Apps
Layout Customization Complete: Your SharePoint list will now use the customized Power Apps form, allowing users to view and interact with the resized multiline text box.
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Frequently Asked Questions

Can I resize a multiline text box in SharePoint using JSON formatting?

Native JSON column formatting in modern SharePoint allows for some layout changes, such as header and footer customization, but it heavily restricts specific width and height adjustments for individual multiline input fields. Using Power Apps is the official workaround.

Do I need a special license to customize SharePoint forms with Power Apps?

A standard Microsoft 365 subscription that includes SharePoint generally comes with the basic Power Apps capabilities required to customize list forms. Special licenses are only needed if your custom form connects to premium data sources outside of SharePoint.

How do I revert a customized Power Apps form back to the default SharePoint form?

Go to your SharePoint list settings, click on 'Form settings,' select the option to 'Use the default SharePoint form,' and click OK. You can also permanently delete the custom Power Apps form from this same menu.

Why is the 'Integrate' button missing in my SharePoint list?

The 'Integrate' button might be hidden if you lack sufficient edit permissions for the list, if custom scripts are blocked by your SharePoint administrator, or if you are viewing the list in the classic SharePoint experience instead of the modern view.