Symmetry within tile?
Pretty self explanatory I guess. I'd like there to be a symmetry toggle, but have it be based within the tile you're drawing on. It's kind of nerve wracking having to constantly eyeball symmetry or delete half the image and paste and flip.
There is a way to get symmetrical drawing if you use the edges of the tile as the split point. Take a look at this thread:
It's of course pretty limited, but until a proper tool is implemented, it's a decent alternative.