Flip Canvas Horizontally

[Husketch]

Hello!
Just a suggestion, please implement a quick way to flip canvas horizontally (with all layers- not just the current layer)
It's a common practice while digital painting and an important one to be able to quickly flip and work on the illustration from a different point of view, and helps finding mistakes usually. 

Thanks:)

[Lucky Clan]

It is already there, you can:
- tap Image>Transform>Flip Horizontal to flip all layers
- select few layer inn Layers popover, then tap Edit>Transform Special>Flip to flip selected layers