This is a great way to add energy and depth to your photographs. Diagonals create a vibrancy to an otherwise flat picture. Diagonals can be used in different ways, sometimes it might draw the viewer’s eye to the most important part of the frame, other times it creates a sense of perspective. At the very least, diagonals provide a little bit of unexpected shape for the eye to dance around. Either way, you should look for diagonals in your photographs and avoid flatness.