For many sidescroller projects, it's necessary to flip the sprite horizontally. However, there are cases when us, as artists, don't realize some fine mistakes in the pose when we focus on the character in their default scale. Characters angled semi-front are especially prone to that kind of artistic error (e.g. they may lean more forward than we intended).
I would like the Editor to have a Button / Hotkey to flip the canvas horizontally, instead of resorting to scaling the root bone's X value by -1.0.