To make your work easy, here is a collection of keyboard shortcuts (For Windows and Mac) for downloading in PDF document. Keyboard shortcuts let you quickly select tools and execute commands without using a menu [via- blogs.adobe].
Adobe Lightroom is a must have tool for all photographers be it beginners, professionals or amateurs. As it mainly targeted to digital photographers, Adobe Lightroom is built entirely different from conventional image editing programs. It offers a structured work flow which helps the users to import and organize digital photographs, enhance them, create slide-shows, printing and publishing photo galleries on the web.