In this Windows Basics training session, led by Jim Cerny of the Sarasota Technology User Group (STUG), participants explored the world of file types and file extensions in Windows. Jim explained how file types evolved from early computing systems to modern applications and demonstrated how file extensions help Windows determine which program should open a file. He showed how to display file extensions in Windows File Explorer, reviewed common document and image formats, and demonstrated how to save files in different formats such as PDF for better compatibility when sharing with others. The session also covered how to manage default apps for different file types, what to do when encountering an unknown extension, and how built-in tools like Paint can be used for simple image editing. Attendees contributed helpful tips and questions about LibreOffice formats, photo file types, and tools like IrfanView and the FileExt website, making this an informative and practical class for Windows users.
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