A file’s format—the way that it’s saved and encoded—determines what you can do with it and which programs will open it. (You can check its format by looking at the file name’s extension.) ...

Open the Word document you want to format for a Kindle. Check for headers and footers in the document, including page numbers. If you find any, they must be deleted.

An ISO file is an exact image of an optical disc such as a CD, DVD or Blu-ray disc. Windows 7 provides limited native support for the format but it does not provide the functionality to check the ...

You can check the exported format by opening the file in QuickTime Player and choosing Window > Show Movie Inspector. The Video Format line in the Inspector palette will show HEVC or H.264 ...