What is a shortcut to delete a group of pictures from digital camera after you download them in a new file?

While the camera is connected to the computer, it will show as an active drive (usually "D" or higher).

Find the drive, click to open it, and wade in until you find the image files. Select the ones you want to delete, right-click them, and click Delete, or just delete the folder that they are in. The camera will create another when it needs it.