PDF Editing Issues

How to Add Bold and Underline to Acrobat PDF Form Fields

Camila MilosovichCamila Milosovich Nov 5, 2026 869 views

Question details

The user needs to apply specific text formatting, such as bold and underline, to words typed inside a PDF form field.

How to Add Bold and Underline to Acrobat PDF Form Fields
Product
Adobe Acrobat
Device & OS
not provided
Scenario
Filling out or designing a PDF form where certain input text requires emphasis using bold or underlined styling.
Observed behavior
To apply rich text formats like bold and underline to specific words or phrases inside a form field rather than plain text.
Before you start

Ensure you have permission to edit the PDF form. Note that rich-text formatting cannot be used if the form field already has a predefined format, such as Date or Number.

Solution 1Recommended

Enable Rich Text Formatting in Acrobat Form Properties

To apply individual text styles like bold and underline within a form field, you first need to enable the rich text property for that specific field.

By default, PDF form fields accept only plain text. Enabling Rich Text Formatting allows users to highlight specific words within the field and change their properties using a floating text-formatting toolbar.

1
Open form field properties

Enter 'Prepare Form' mode in Adobe Acrobat. Right-click the target form field and select 'Properties' from the context menu.

2
Enable rich text

Navigate to the 'Options' tab within the Properties window and check the box for 'Allow Rich Text Formatting'.

3
Access the formatting toolbar

Exit Prepare Form mode. Click inside the form field, select the specific text you want to format, and press Ctrl+E (Windows) or Cmd+E (Mac). A floating text-properties toolbar will appear, allowing you to apply bold, underline, and other formats.

Enable Rich Text Formatting in Acrobat Form Properties
Formatting Method Conflicts: Rich-text formatting cannot be combined with a predefined field format such as Date, Time, or Percentage. You must choose to use either a predefined format or rich-text formatting.
Easy PDF Form Filling

Edit and Fill PDF Forms Easily with WPS Office

WPS Office provides a comprehensive PDF toolkit that allows you to easily edit text, fill out interactive forms, and manage your PDF documents with an intuitive interface.

  1. 1. Open your PDF in WPS Office: Launch WPS Office and open your PDF document containing the form fields.
  2. 2. Navigate to the Edit tab: Click on 'Edit PDF' from the top ribbon to easily modify existing text and apply bold or underline styles.
  3. 3. Fill out forms: Simply click on the interactive form fields to enter your text. Use the floating or top toolbar to adjust text properties as needed before saving.
Seamlessly edit PDF text and apply bold, underline, or italic formattingHighly compatible with Adobe Acrobat PDF formats and interactive fieldsUser-friendly interface for filling, signing, and printing formsLightweight software that loads large PDF forms instantly
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Frequently Asked Questions

Why can't I see the text properties toolbar when I press Ctrl+E?

The floating toolbar (Ctrl+E) only appears if you have clicked inside a field that has 'Allow Rich Text Formatting' enabled. Also, make sure you have exited the 'Prepare Form' mode before trying to type and format the text.

Can I make the entire form field bold by default?

Yes, you can set a default text style for the entire field. Open the field Properties, go to the 'Appearance' tab, and select a bold font style from the Font dropdown menu. This does not require rich text to be enabled.

Will my rich text formatting show up when someone else opens the PDF?

Yes, as long as the recipient opens the PDF in a standard viewer that supports rich text rendering, such as Adobe Acrobat, WPS Office, or most modern web browsers, your formatting will be visible.