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

- 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.
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.
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.
Open the modern SharePoint list where you want to customize the form layout and adjust the text box.
Click on the 'Integrate' menu in the top command bar, select 'Power Apps,' and then choose 'Customize forms'.
Once the Power Apps studio opens, click on the specific multiline text box data card within the form editor screen.
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.
Click 'File,' save your newly customized form, and select 'Publish to SharePoint' to apply the dimension changes to your live list.

Manage Your Documents Seamlessly with WPS Office
While SharePoint and Power Apps are excellent for handling complex list data, managing standard documents doesn't have to be complicated. WPS Office provides a free, lightweight, and highly compatible alternative to Microsoft Office for your daily document processing needs.
- 1. Download the software: Visit the official WPS website and download the installation package for your operating system.
- 2. Install WPS Office: Run the downloaded installer and follow the simple on-screen instructions to complete the setup.
- 3. Open and edit files: Launch WPS Office and open your existing Microsoft Word, Excel, or PowerPoint documents to begin editing immediately.

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.




