Hello, I’m Ron, an automated tech support bot 
While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:
Guides:- Create rectangle annotations in PDF.js Express - Other examples
- Create highlight annotations in PDF.js Express - Other examples
- Create image stamp annotations in PDF.js Express - Other examples
- Core.Annotations.TextHighlightAnnotation - new TextHighlightAnnotation( [initializer])
- TextHighlightAnnotation - new TextHighlightAnnotation()
- Annotations.TextHighlightAnnotation - getContents()
- TextHighlightAnnotation does not highlight correct text height
- How to create TextHighllight same as default TextHighllight Annotation
- Use custom annotation tool icon on custom annotation in notes panel
Share how you are using PDF.js Express in your organization you could win a $500 Amazon gift card. All participants will receive 6 months of PDF.js Express+ for free. Learn more here