• Photomerge Compose: Create all-new scenes by pulling elements from one photo and placing them in another.
• Autocrop suggestions: Cropping a photo can be straightforward. But for times when you're not so sure, Photoshop Elements 13 can now present you with four crop options.
• eLive: Elements Live view (eLive) is a concept to make content and resources available to users, visually pleasing and integrated right into Photoshop Elements Editor and Organizer.
• Facebook cover photos: Post a Facebook cover photo that sets you apart from the rest.
• New Guided Edits: Go retro and reimagine the world in black and white. Or, retain one dominant, eye-popping color, and turn the rest of the photograph black and white
• Edit and refine selections: Selections can be tricky - especially making extremely fine ones.
• HiDPI display support: Photoshop Elements 13 now has native support for high-resolution Mac display devices (Retina displays). 
• Content-aware fill: Sometimes unwanted or unnecessary objects are captured in your photographs.
• Refine edge: The options to refine the edges of a selection are more accessible through the Tool Options bar.
• Adobe Camera Raw 8.6: The latest version of Adobe Camera Raw (ACR 8.6) is integrated into Photoshop Elements 13.
• Quick Edit effects: The effects in the Quick mode have been reimagined. Each effect now displays five possible variations so that you can choose one that is best for you.  
• Expert mode effects: Spruce up your pictures with the newly categorized and revised effects in the Effect panel (Expert mode). 19 new effects have been added, and all thumbnails have been improved to display the Effect more clearly.
• Enhancements: Scrapbooking preset, Layer styles, Type tool - Scrubby slider, Recently-opened files.

Removed from Photoshop Elements 13:

• Edit > Remote Connection
• Enhance > Photomerge Style Match
• Crop tool: The Golden Ratio option is no longer available
• Single core platforms are no longer supported
• Operating Systems support: Mac OSX 10.7 not supported

System Requirements:

Enhancements

HiDPI and Retina display support
64-bit support for Photoshop Elements, Adobe Premiere Elements, Elements Organizer, and Adobe Photo Downloader

Windows

1.6 GHz or faster processor (including single-core support)
Microsoft® Windows® 7.x or Windows 8.x (32 bit installed on 32-bit operating systems and 64 bit installed on 64-bit operating systems)
2 GB of RAM
4 GB of available hard-disk space (additional free space required during installation)
Color monitor with 16-bit color graphics adapter
1024 x 768 display resolution
Microsoft DirectX 9 or 10 compatible display driver
DVD-ROM drive
Internet connection required for product activation*

Mac OS

64-bit multicore Intel® processor
Mac OS X v10.8 through v10.10
2 GB of RAM
4 GB of available hard-disk space (additional free space required during installation)
1024 x 768 display resolution
DVD-ROM drive
QuickTime 7 software required for multimedia features
Internet connection required for product activation*

* Internet connection required. This product may integrate with or allow access to certain Adobe or third-party hosted online services (“Online Services”). Online Services are available only to users 13 and older and require agreement to additional terms of use and Adobe’s online privacy policy (see www.adobe.com/go/terms). Online Services are not available in all countries or languages, may require user registration, and may be discontinued or modified in whole or in part without notice. Additional fees or subscription charges may apply