Other PDF Issues

How to Fix PDF Form Tooltip Not Showing in Preview

Chanuka Geekiyanage Oct 23, 2026 869 views

Question details

The user is unable to view the custom tooltip added to a PDF form's dropdown field during preview mode; an auto-generated image description is displayed instead.

How to Fix PDF Form Tooltip Not Showing in Preview

Product: PDF Editors
Device & OS: not provided
Scenario: Previewing a fillable PDF form after adding custom hover tooltips to dropdown properties.
Observed behavior: The intended tooltip fails to appear on hover, and automatically generated image alternative text is shown instead.

Before you start

Ensure you are testing your interactive form in a dedicated, fully-featured PDF viewer (such as Adobe Acrobat or WPS Office), as many web browsers do not fully support PDF form tooltips.

Solution 1Recommended

Verify Field Properties and Test in a Standard PDF Viewer

Check that the tooltip text was successfully saved in the field properties and open the document in a dedicated PDF application to bypass browser limitations.

Many interactive PDF form elements behave differently depending on the application used to view them. Built-in previewers in web browsers or lightweight document viewers often strip out interactive features like tooltips, or misread accessibility tags as image descriptions.

Open form editing mode

Open the PDF document in your designated PDF editor and activate the form editing or preparation mode.

Access dropdown properties

Right-click the problematic dropdown field and select 'Properties' from the context menu.

Verify tooltip text

Navigate to the 'General' tab in the Properties dialog box, ensure your desired text is correctly typed into the 'Tooltip' field, and close the dialog to save.

Preview in a dedicated viewer

Exit form editing mode, save the document, and open the file in a standalone PDF application (like Adobe Acrobat or WPS Office) to accurately test the hover behavior.

Verify Field Properties and Test in a Standard PDF Viewer

Alternative Text Conflict: If an auto-generated image description still appears, the PDF viewer might be prioritizing accessibility alternative text over the field's tooltip property.

WPS PDF Form Editor

Create and Preview PDF Forms Seamlessly with WPS Office

WPS Office provides a comprehensive PDF toolkit that allows you to easily insert dropdowns, add custom tooltips, and accurately preview interactive forms without rendering conflicts.

1. Open the PDF: Launch WPS Office and open your PDF document.
2. Access form tools: Navigate to the 'Form' tab on the top ribbon to access interactive form field tools.
3. Edit field properties: Double-click any form field to edit its properties, including setting the hover tooltip under the General settings.
4. Preview the tooltip: Click 'Close Form Editing' on the ribbon to instantly switch to preview mode and hover over the field to test your tooltip.

Accurately preview interactive PDF form fields and tooltips instantlyFully compatible with standard PDF formats and Adobe Acrobat formsLightweight application with highly intuitive form-building tools

microsoft office alternative - wps office

Frequently Asked Questions

Why do web browsers not show my PDF form tooltips?

Web browsers use lightweight, built-in PDF viewers designed for fast reading rather than interactive forms. They often lack support for advanced PDF elements, including custom hover tooltips and specific accessibility tags.

Can I add tooltips to text fields and checkboxes?

Yes, standard PDF editors allow you to add tooltips to any interactive form element, including text boxes, radio buttons, and checkboxes, by accessing the 'General' tab in the element's Properties menu.

How do I remove the auto-generated image description?

You can resolve this by ensuring the document is properly tagged for accessibility. Check the form field's properties to verify the tooltip is populated, and clear any unwanted alternative text from the document's broader accessibility tags.

PDF Troubleshooting