PrintScrn - This will take a photo of your entire screen(s) and will put it in your clipboard.
Alt+PrintScrn - Takes a photo of just the current window you have selected and places it in your clipboard.
Note: In JDE you need to press Ctrl + Alt + PrintScrn so it doesn't mess up what is viewed on the screen.
All functions place the photo in your clipboard and you can paste it, Ctrl+V, into an email.
Windows Logo Key + Shift + S (sends your selection to your clipboard)
Windows Logo Key + PrintScrn (sends entire viewing area to a file located in: C:\Users\%username%\Pictures\Screenshots)