How To Flip An Image In Google Docs
1.Right-click it, and then click Cut.
2.you need to use the Drawing function.
Click Insert → Drawing → + New.
3.In the Drawing window, paste your image.
4.Click Actions button in the toolbar at the top. Hover your cursor over Rotate, then click either Flip horizontally or Flip vertically.
5. When you have successfully flipped your image, click Save and Close