[JAVA] 'PDF' library - Is it possible to copy after dragging?

[JAVA] ‘PDF’ library - Is it possible to copy after dragging?

hello.
The ‘PDF’ library works fine. But I have one question.
When output as pdf in ‘Powerpoint’ or ‘Word’ program, the text is touched and dragged. You can use this to make a copy.(copy clip)
However, this is not the case when proceeding through ‘Processing Tool’.

What is the reason and is there a solution?