Shotwell, found in the MATE menus at Menu > Graphics
> Shotwell, is a digital photo organizer. It allows you to import photos from disk or camera, organize them in various ways, view them in full-window or full-screen mode, and export them to share with
others. It is able
to manage photos in many different image formats, also including raw CR2 files.
When you first launch Shotwell, it scans your computer for photos and imports them so that you can use Shotwell to organize them. Once you have all the photos from your computer's hard drive within Shotwell, you can import new files by choosing File > Import From Folder from the menus, or by dragging and dropping them onto the Shotwell window, or by connecting a camera to your computer and choosing to import the photos from there.
With Shotwell, you have several features to help you organize your photos. You can group photos that were taken at the same time into events, then rename, merge and sort events. Flag photos to mark them as special, or to work with them as a set. You can also search for, rate, tag, and title your photos. Shotwell also provides the ability to edit the photos themselves. You can change the date and time of photos where they are incorrect, crop photos, remove red-eye, auto-enhance to improve brightness and contrast, rotate or flip a photo, and even straighten photos taken at an angle.
Of course, you can share your photos from Shotwell by exporting or printing them. You can also publish them to Facebook or other online sites, send them via email or instant messaging, or simply display them as a slideshow.
To learn more about how to use each of the features of Shotwell, see the Shotwell Photo Manager Manual by pressing F1 while Shotwell is open.