Details are important here. Are you using vision or perspective? If your using perspective, unless something changed I don’t believe it is possible. If your using vision and you want to save it somewhere then the windows short cuts I don’t believe would cut it since you want to have it saved somewhere in the background. A quick search though brings up what others have done to take and save screenshots.
How to take screenshots of your Ignition windows - Ignition - Inductive Automation Forum