PDF Viewer doesn’t display some types of annotations on PDF file. Does PDFJS not support these types of annotations?
Warning: Unimplemented annotation type “FreeText”, falling back to base annotation
pdf.worker.min.js:2
Warning: Unimplemented annotation type “Popup”, falling back to base annotation
https://cdn.webix.com/extras/pdfjs.js
https://cdn.webix.com/extras/pdfjs/pdf.worker.min.js