User Guide for RIM Bold
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If you save an email message that contains an attachment that you have previewed, the email message and the attachment are stored in the device memory until you delete the email message......
In an attachment, press the Menu key...Set the font fields...Click Save......
Open a link in an attachment...
Stop downloading an attachment...
To change attachments that you download, you can use third-party editing applications (such as Word to Go™, Slideshow to Go® and Sheet to Go®) that are designed for use on BlackBerry devices......
You can view several attachment types on your BlackBerry® device, including .zip, .htm, .html, .doc, .dot, .ppt, .pdf, .wpd, .txt, .vcf, and .xls files...You can also view .bmp, .gif, .jpg, .png, .tif, and .wmf files, and play .wav and .mp3 files......