add guide for screenshots / screencasts

_toc.yml

@@ -16,6 +16,7 @@ chapters:
       - file: user-guide/evolution_for_o365
       - file: user-guide/thunderbird_for_o365
       - file: user-guide/gnome_desktop_icons
+      - file: user-guide/gnome_screenshots
       - file: user-guide/xrdp
       - file: user-guide/ssh_host_key_certificates
       - file: user-guide/ssh_client_config

user-guide/gnome_screenshots.md

@@ -0,0 +1,22 @@
+# Gnome Screenshots and Screencasts
+
+Gnome has a build in screenshot and screencast application. You can use following shortcuts to easily use this functionality:
+
+__PrintScreen__: Take a screenshot of the desktop
+__Alt + PrintScreen__: Take screenshot of the current active window
+__Shift + PrintScreen__: Take a screenshot of an area you select
+
+With all shortcuts the screenshots will end up in the _Pictures_ folder in your home directory. If you don't have a _Pictures_ folder the files will end up in your home folder.
+
+You can also hold down __Ctrl__ with any of the above shortcuts to copy the screenshot image to the clipboard instead of saving it.
+
+
+To create a screencast of your desktop you can use following shortcuts:
+
+ - __Ctrl+Alt+Shift+R__: Start recording
+ - __Ctrl+Alt+Shift+R__: Stop recording
+
+The video is automatically saved in your _Videos_ folder in your home folder. If you don't have a _Videos_ folder the files will end up in your home folder.
+
+
+Reference: https://help.gnome.org/users/gnome-help/stable/screen-shot-record.html.en