解鎖或加密PDF檔案：Colab PDF Protector / Unlocking or Encrypting PDF Files: Colab PDF Protector

PDF檔案的安全性加密與解除限制通常需要特別的軟體。如果我們只有手機的話，不妨來使用我開發的Colab PDF Protector，用Google Colab的腳本新增或移除PDF的安全性設定吧。

PDF file security encryption and decryption often require specialized software. If you only have a mobile phone, consider using my Colab PDF Protector, a Google Colab script designed to add or remove security settings from PDFs.

移除PDF上的註解：PDF Annotation Remover / Removing Annotations from PDFs: PDF Annotation Remover

PDF的註解功能可以允許我們在原始檔案上添增額外的文字、標亮、線條、筆記。而且這些註解還可以刪除、修改，讓原始檔案保持它原本的樣子。不過如果有大量註解需要移除的話，手動操作其實非常繁瑣。這時候你可以用我開發的PDF Annotation Remover，讓PDF檔案的註解全部移除吧。

PDF's annotation feature allows us to add additional text, highlights, lines, and notes directly onto the original file. These annotations can also be deleted or modified, preserving the original document's integrity. However, manually removing a large number of annotations can be quite tedious. For this, you can use my PDF Annotation Remover to remove all annotations from your PDF file.

將PDF轉換成模仿成掃描檔：ScanSim PDF / Converting PDF to Simulated Scanned Document: ScanSim PDF

列印、簽名、拍照、轉換成PDF、上傳，這是現在很多證明文件的處理手續。處理後的PDF檔案只是圖片的封裝，不能直接選取與複製，只能作為證明文件留存，這已經是最基本的資安防護手段。然而，如果可以將數位文件直接轉換成彷彿掃描檔一樣的檔案，那不就可以省下列印與掃描的繁雜手續了嗎？也許這時候Docker APP ScanSim PDF就能夠派上用場了。

Printing, signing, taking a photo, converting it to PDF, and uploading it—this is the procedure for processing many verification documents nowadays. The processed PDF file is merely a container for the image; the text cannot be directly selected or copied. It can only serve as an archive of the verification document, which is a basic security measure. However, if digital documents could be directly converted into files that resemble scanned documents, wouldn't that eliminate the tedious printing and scanning steps? Perhaps the Docker APP ScanSim PDF could be useful in this situation.

如何將draw.io的向量格式插入到LibreOffice Writer中？ / How to Insert a Vector Graphic Format From draw.io Into Libreoffice Writer?

首先我們要將draw.io的檔案列印成PDF，然後使用「PDF轉換成SVG向量圖」來轉換成EMF檔案格式，這樣就能將EMF檔案插入到LibreOffice Writer中，並且維持它的向量圖特性囉。

First, we need to print the draw.io file as a PDF format, then use "PDF to SVG Vector Graphic Converter" to convert it into EMF file format. This way, the EMF file can be inserted into LibreOffice Writer, maintaining its vector graphic properties.

如何將PDF轉換成SVG向量圖？ / How to Convert a PDF Into Vector Graphic Images like SVG?

如果要將PDF轉換成SVG、EMF等向量圖以及PNG圖片，可以使用我寫的Colab「docker-app-PDF-to-Crop-SVG.ipynb」來轉換。

如何查看PDF裡面的註解？ / How to View Annotations in a PDF?

請使用PDF-XChange Editor來檢視PDF的註解，不要用瀏覽器內建的陽春PDF檢視器來看。

在LibreOffice插入Google Slide繪製的向量圖片 / Insert the Vector Image from Google Slide into a  Document

用Google Slide畫示意圖是很方便啦，不過要怎麼把畫好的圖片插入到LibreOffice Writer裡面呢？