Hi Haikal Khair,
At present, PDF viewer does not support adding texts in the PDF documents. We have logged feature requests for providing the support for the same. We will implement these features in any of our upcoming releases.
Can you please confirm us whether your requirement is similar to the adobe textbox behavior or not?
Please refer the below image which is taken from adobe reader to confirm the requirement:
Regards,
Gangagowri Rajendran