You can add multiple comments to a PDF document. If you add the comments as files this will allow you to add many different file types. You can add many different file types such as audio, image, PDF files, Word files, and many more. If you add the comment as an audio file by using the browse button on the audio recorder then the file types will be limited to .wav, .wave, .aif, .aiff, and, .aic. You can also record the comment and add it to the document.
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