How to Fix PDF Form Text Losing Bold Formatting After Editing
Question details
Users experience a loss of bold text formatting in PDF form fields when a calculation script overwrites manually entered rich text.
- Product
- PDF Editors
- Device & OS
- not provided
- Scenario
- Filling out and attempting to format text in a calculated rich-text field within a PDF form.
- Observed behavior
- Bold formatting applied manually to the text disappears immediately after the user exits the calculated form field.
Ensure that your PDF editor supports JavaScript and rich-text field properties, and verify that the specific form field is configured to allow rich text formatting in its properties.
Apply Bold Formatting Using JavaScript Span Objects
Since the calculation script overwrites manual formatting, you must define the bold style directly within the script using an array of Span objects.
When a field is set to calculate its value automatically, the calculation script takes complete control over the field's content. Because of this behavior, any manual rich-text formatting (like bolding text via keyboard shortcuts or toolbars) is discarded when the script updates the value.
To resolve this, you must instruct the PDF script to apply the formatting dynamically using the event.richValue property.
Open your PDF form in editing mode, right-click the target form field, and select 'Properties' from the context menu.
Navigate to the 'Calculate' tab in the Properties window, select 'Custom calculation script', and click the 'Edit' button to open the JavaScript editor.
Instead of setting a standard value, define an array of Span objects assigned to event.richValue. Set the text content and apply the bold style by setting the fontWeight property.
Use a script format similar to: event.richValue = [{ text: 'Your Calculated Result', fontWeight: 800 }]; then click 'OK' to save and apply the script.
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WPS Office provides a comprehensive, user-friendly PDF editor that allows you to easily fill, edit, and manage PDF forms while maintaining document integrity and formatting.
- 1. Open Your PDF Form: Download and launch WPS Office, then open your interactive PDF document.
- 2. Access Form Tools: Navigate to the 'Form' tab on the top ribbon to access specialized form-filling and editing tools.
- 3. Edit and Format: Click directly into form fields to enter text, or switch to the 'Edit' tab to modify existing static PDF text and adjust formatting easily.
- 4. Save Your Document: Click 'Save' or 'Save As' to preserve your filled data, layouts, and applied rich-text styles securely.
Frequently Asked Questions
Can I use both manual formatting and a calculation script in a PDF form?
No, the calculation script completely overwrites manually entered values and their standard formatting upon execution. You must handle all desired formatting within the calculation script itself.
How do I enable rich text in a PDF form field?
In the form field properties menu, navigate to the 'Options' tab and check the box for 'Allow Rich Text Formatting'. This setting tells the PDF viewer to accept rich-text inputs and JavaScript Span objects.
Why does my text formatting change only when I click out of the field?
Calculation scripts are typically triggered by an 'OnBlur' or similar exit event. This means the script executes and overwrites the field's value immediately after you exit (or click out of) the active field.
What is a Span object in PDF JavaScript?
A Span object is a JavaScript structure used within PDF forms to define specific text properties (such as font weight, color, style, and size) for a targeted segment of rich text within a form field.
