Dropbox has been able to automatically upload photos from your desktop or smartphone to the cloud for a while now. To make things a little bit easier for people who frequently take screenshots, Dropbox has just added support for automatic screenshot uploads. Here's how to set it up:
After your Dropbox desktop software has been updated to the latest release, take a screenshot. The first time you do this after the update, you'll get a Dropbox window that asks if you want to enable automatic screenshot uploads. Click the "Save Screenshots to Dropbox" button.
On PCs, screenshots will automatically upload to the Screenshot folder in your Dropbox. Pressing the Ctrl+Print Screen shortcut will upload the screenshot and copy the link to your clipboard. On Macs, screenshots upload automatically and the link is copied to your clipboard. To share the screenshot link, just paste it into your e-mail, Twitter, Facebook, etc.
If you change your mind and want to disable automatic screenshot uploads, go to Dropbox preferences > Import, then uncheck the box next to "Share screenshots using Dropbox."