How to Create a Multiline Tooltip in an Acrobat PDF Form
Question details
The user needs to insert line breaks into an Acrobat PDF form field tooltip to display a long list of codes, but pasting multiline text only inserts the first line.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Designing a PDF form that requires detailed, multiline instructional text or code lists within the tooltip hover box of a specific field.
- Observed behavior
- When pasting multiple lines of text into the standard tooltip properties field, Acrobat discards the line breaks and only saves the first line of the pasted content.
Ensure you have the JavaScript Console enabled in your Adobe Acrobat settings by navigating to Edit > Preferences > JavaScript and checking 'Enable Acrobat JavaScript'.
Use the Acrobat JavaScript Console
The most effective way to force line breaks in a PDF form tooltip is by assigning the text via the JavaScript Console using the newline character.
The standard Properties dialog box for Acrobat form fields does not support manual line breaks. To overcome this limitation, you must use Acrobat's underlying JavaScript property (userName) and insert a newline character (\n) where you want the text to break.
Press Ctrl+J on Windows or Cmd+J on Mac to open the Acrobat JavaScript Console window.
Type the following script into the console: this.getField("YourFieldName").userName = "Line one\nLine two\nLine three"; replacing 'YourFieldName' with the exact name of your form field and modifying the text as needed.
Highlight the entire line of code you just typed, then press Ctrl+Enter on Windows or Cmd+Enter on Mac to run the script.
Close the JavaScript Console, select the Hand tool, and hover your cursor over the modified form field to verify that the tooltip now spans multiple lines.
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Frequently Asked Questions
Why does Acrobat remove line breaks when pasting into the tooltip box?
The standard tooltip input field in the Acrobat Field Properties dialog is designed to accept only single-line string values. It automatically strips out newline characters from copied text to prevent UI formatting issues.
What is the correct newline character to use in the script?
In Acrobat JavaScript, the newline character is represented by a backslash followed by the letter n (\n). Inserting this sequence inside your text string forces the tooltip to drop to the next line.
Can I apply multiline tooltips to multiple fields at once?
Yes. If you are familiar with JavaScript, you can write a loop in the JavaScript Console that iterates through an array of field names and applies the same multiline tooltip text to all of them simultaneously.
Will these multiline tooltips work on mobile PDF viewers?
While the tooltips will display perfectly in standard desktop applications like Adobe Acrobat and Adobe Reader, third-party mobile PDF viewers often have limited support for interactive form features and may not render hover tooltips correctly.
