1 - Use software "Adobe Acrobat" to open a Password Protected PDF (software "Adobe Reader" can not remove it)
2 - Enter the password
3 - According to the picture steps, press menu: advanced (Step 1) -> security (Step 2) -> remove security (Step 3) -> save
(overwrite the existing PDF files)
1- 用軟件 "Adobe Acrobat" 去開啟保密的 PDF (軟件 "Adobe Reader" 是不可以刪除的)
2- 輸入密碼
3- 根據圖片步驟, 按 menu: advanced (步驟1) -> security (步驟2) -> remove security (步驟3) -> save
(覆蓋現有的 PDF 文件)