The Sun welcomes comments from readers via letters to the editor. All comments become the property of The Sun, which reserves the right to edit them. To submit a letter to the editor, use the form ...

If you have Microsoft Word installed on your computer, you can directly open PDF files in Word. Just open Word, click on "File," then "Open," and select your PDF file. Word will convert it into an ...

Overview Password protection is the most effective way to secure a PDF file and prevent unauthorized access. Encryption is a more trustworthy method for ma ...