Curious cabbage and screenshots

I just got one of these. Has anyone else seen one? And I am using this as a chance to ask, politely, for a step by step guide to making and posting screenshots. My problem is that I play on an azerty keyboard and the key or keys to press for screenshots are labeled i French. So if someone could point out exactly what key to press and how to upload the shot to wherever it needs to go . . . I would be very appreciative and may even give them the cabbage, assuming they are playing on Jamestown, and it cannot be made into a super duper yellow bile food.