In addition to editing text tables and charts in a document, Google Docs can also add and edit images. If part of your editing process involves flipping an image in Google Docs, the following post will explain all the ways you can flip an image in a document both vertically and horizontally across multiple devices.
Google Docs Tutorial / Mirror and Flip Images / Graphics / Photos
There are several ways to flip images in Google Docs.
If you use Google Docs on the web on your Mac or Windows computer, you can flip an image you've added to your Docs file right from the editor screen.
The above method is the only way to flip your images horizontally in Google Docs. All other methods mentioned here will only let you flip or rotate an image vertically.