capture image

Hello, I'm going to save a scene as image file on disk when an event is triggered. But I have no idea how to do this. Please help me with this problem. If it is impossible, saving a source as image is also alright. Best, ;)

Hello everyone. I couldn't find similar thread here as "The following words were not included in your search because they are too short, too long, or too common: still" but I've seen people asking this question on other forums. An option- simple small button for capturing still image would be...