Writers & Publishers: How to Activate (or Deactivate) Lending on your eBooks on Amazon's Kindle

Amazon recently debuted the ability for readers to lend their Kindle books with friends. I did a detailed overview of the new program here. But I thought I'd also take this opportunity to do a "just the part we authors/publishers care about" post over here. Chances are, if you are an author or publisher with a book available for Amazon's Kindle, you really only have one question:

How do I turn lending on or off?Log into the Amazon Digital Text Platform (Amazon DTP). Click the...