最近在Amazon 買書，發現有新版的韌體公布了，既上次年初的v2.3，有增加新的功能。
1.Collections: Organize your books and documents into one or more collections.
2.PDF Pan and Zoom: Zoom into PDFs and pan around to easily view small print and detailed tables or graphics.
3.Password Protection: Password protect your Kindle when you're not using it.
4.More Font Sizes & Improved Clarity: Enjoy two new larger font sizes and sharper fonts for an even more comfortable reading experience.
5.Facebook & Twitter Posts: Share meaningful book passages with friends on Facebook and Twitter directly from your Kindle.
6.Popular Highlights: See what the Kindle community thinks are the most interesting passages in the books you're reading.
升級的方式，
依照不同kindle 型號下載檔案，下載完之後的檔案，放入root目錄下，就是有出現"audible," "documents," and "music" 這些目錄的地方。
然後按下Menu，選擇"Settings."， 在選擇 "Update Your Kindle."就會自己升級了。
我升級完的結果，我自己覺得跟自己的習慣沒有太大的變化，比如密碼，因為只有我在用，我就不知道設定密碼的用處，支援FB等網站，我自己也沒這個習慣把看到東西或想法放在FB上。
所以，對於某些人會有用處吧。
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