Flipping the image

[ruslang02]

Adds a button that can flip the image horizontally.

[desotopete]

Is there any way you could create the code to add a button to the reference docker to turn it Grayscale?

[carnifexx]

alternatively just use pureref instead https://www.pureref.com/
you can set "Toggle Grayscale" with Alt-G there