
To edit or delete a collection, press and hold it from the homescreen. You can also drag items together to create collections on the homescreen below the carousel. With Fire tablets, swipe from the left edge of the screen from the book list. Note that content doesn’t have to be downloaded to add it to a collection. After naming the collection, you get the option to select all the titles from your account to add to it. From the homescreen, tap the menu button and choose to create a new collection. The process of creating collections is basically the same across Kindle devices and apps. Also, removing a collection or an ebook from a collection doesn’t delete the book from your device. You can have the same title appear in multiple collections. You can organize your ebooks, active content (Kindle Paperwhite only), and personal documents into custom collections, but newspapers, magazines, and blogs aren’t supported.

Cloud collections can only be viewed and created on a Kindle device or with a Kindle app that supports cloud collections (see list below). I don’t think Amazon will enable an option to add and manage personal files in the Kindle Cloud Reader any time soon.The first thing that often confuses people about cloud collections is that you cannot access or create them in the “cloud” or from your Amazon account. Amazon just doesn’t want users to treat Kindle Cloud Reader as a web-based reader of mobi ebook files downloaded from other sites. This is the major disadvantage of the Kindle Cloud Reader. In other words, when you open Cloud tab in the Kindle Cloud Reader, you’ll only see the books purchased from the Kindle Store. However, this useful feature is not available in:

They can also download these personal documents from the Kindle cloud to particular Kindle apps.

Usually, users can add personal documents to the connected Kindle device or app, by sending them to a special email address. You can’t add and read your personal files This article from last year about the KCR says:ģ.

But after poking around Amazon's Web site and Googling "kindle cloud reader send mobi", it looks like it may not be. I've used the Send To Kindle Chrome extension a lot, and I thought for sure this should be possible.
