The Transform submenu of the Layer menu contains commands which flip or rotate the selected layers of the image.
You can access this submenu from the main menu through Layer → Transform.
The Transform submenu contains the following commands:
7.46절. “Flip Horizontally”
7.47절. “Flip Vertically”
7.48절. “Rotate 90° clockwise”
7.49절. “Rotate 90° counter-clockwise”
7.50절. “Rotate 180°”
7.51절. “Arbitrary Rotation”
7.52절. “Offset”