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.

event.target.disabled = !event.detail.editable;
          },
        };
        this._dispatchEventFromSandbox(actions, jsEvent);
      });
      selectElement.addEventListener("input", event => {
        const exportValue = getValue(event,  true);
        const value = getValue(event,  false);
        storage.setValue(id, { value: exportValue });
        this.linkService.eventBus?.dispatch("dispatcheventinsandbox", {
          source: this,
          detail: {
            id,
            name: "Keystroke",
            value,
            changeEx: exportValue,
            willCommit: true,
            commitKey: 1,
            keyDown: false,
          },
        });
      });
      this._setEventListeners(