Taking a screenshot in OS X is a popular option for capturing activity on your computer, whether for communicating instructions to people or documenting events that are happening on your system. Usually screenshots are taken when sitting at the local system, but if needed you can also do so remotely by several different means.
The easiest way to take a remote screenshot is by using the Screen Sharing service in OS X. By enabling this in the Sharing system preferences and then connecting to the remote system to view its screen, you are provided a couple of ways to take a screenshot.
Since through Screen Sharing you are virtually placed in front of the remote machine, the first option is to use the standard screenshot hotkeys such as Shift-Command-3 to invoke the screenshot function on the remote system. By doing this, you can take a screenshot as if you were sitting in front of it, and then be able to upload the captured image to the location of your choice or otherwise manage it.
The second approach is to use the Screen Sharing application’s ability to capture a screenshot. To do this, when you have the remote desktop session established, go to the Connection menu on your current computer and choose “Save Screen Capture As” to save the image in the location of your choice. You can also switch to the Finder or another application, then invoke screenshot hotkeys locally to take a picture of the Screen Sharing application window;