Attach (recommended) or Link to PDF file [here:] Can't see how to attach a pdf here, but it is simple to create. Add a form object textbox to a pdf and make sure the option for "Multiline" is true.

Steps to reproduce the problem:
1.  Open a document with a Textbox that is set to Multiline.
2. Attempt to hit the Enter key to go to a new line.

What is the expected behavior? The cursor goes to a new line.

What went wrong? It does not go to a new line.

Link to a viewer: It can be reproduced on mozilla.github.io/pdf.js

I corrected the issue by altering the pdf.js file like this
element.addEventListener("keydown", event => { 
[...]
--} else if (event.key === "Enter") {
++ } else if (event.key === "Enter" && !this.data.multiLine) {

Our initial testing is coming through clean, and hopefully something like this code can be committed to the project in the future.

rendered.style.zIndex = zIndex++;
          if (element instanceof PopupAnnotationElement) {
            
            
            div.prepend(rendered);
          } else {
            AnnotationLayer.#appendElement(
              rendered,
              data.id,
              div,
              accessibilityManager
            );
          }
        }
      }
    }
    this.#setAnnotationCanvasMap(div, parameters.annotationCanvasMap);
  }
  /**
   * Update the annotation elements on existing annotation layer.
   *
   * @public
   * @param {AnnotationLayerParameters} parameters
   * @memberof AnnotationLayer
   */
  static update(parameters) {