The Send to Kindle Button lets readers enjoy your blog anytime, everywhere on their Kindle devices and free reading apps.
Some themes make a lot of changes to the structure of your blog without reusing the normal CSS classes. In this case, you should use the Advanced settings screen to create custom CSS selectors. These will allow the button to find your content body and exclude unrelated information.
In the Advanced settings screen, there is an option to provide your own HTML
markup to customize how you want the button to look. Just make sure to give it
Usually, this is caused by hosting images on a different domain than what the content is hosted on, such as a content delivery network. By default, web browsers restrict scripts from downloading resources if the domains do not match. You can override this behavior by modifying HTTP headers related to Cross-Origin Resource Sharing. Otherwise, place a copy of the image on the same server as the content and that will be downloaded instead. Images that cannot be downloaded will not appear in the preview window.
The content body refers an element on the page containing all of the content for a given article. If content is spread out across multiple paragraph tags, and all of those tags are contained in single section tag, the content refers to the section tag. Sometimes, unwanted elements such as sidebars, advertising, comments and other sections are inline with the content. You can exclude all of these pieces with a comma-separated list of CSS selectors.
Use the Advanced settings to create a custom CSS selector for your content. The
selector should point to a single link which goes to the next page. For example,
if you have a link to the next page with an id "next", use the selector