In Photoshop, click Window>Actions.the and Key, Recordto Image>CanvasNew choosethen button. Actionclicka Functionthe Next, button Press go Rotation>Flipand pressing stop F8 recording.(for Horizontal Now example) will flip your image horizontally. I’ve assigned New Layer and my favourite brushes to my function keys. You may have to turn on standard function keys in Settings, but this is a great way to speed up your workflow!