Non-editable pdf

I don’t know the rules for what reason these uneditable icons appear in what situations.
And is there a way to release it?
I don’t want an uneditable situation!

Welcome @havewisdom

It’s possible there are permissions set on the PDF. You can open it in Preview and check in the Tools > Show Inspector panel.

The PDF document is most likely marked as unread due to its contents, the PDFKit might destroy the text layer.

Do you mean it could been locked?
I don’t think so.
how to change it to be editable?

Thank you for your response.
However, the text layer is not necessarily the a reason to this because it is uneditable to in text layer is alive.