- If you want to do perfect 90-degree curves you can use a circular brush tool to draw a circle in the size you want and then remove what you don't need. the brush tool has a maximum size of 32 though so if you want to go bigger, use a site like this: https://donatstudios.com/PixelCircleGenerator It was made for Minecraft
- Or you can use another image editor and copy over the curved line when you are done.
It is possible to go above the 32 brush limit, by using the shortcut to increase the brush instead of the slider itself... The number doesn't change though, so it's near impossible to get the exact size if needed more than once.
The shortcut works this way:
Hold down ctrl + alt (in that order), click and drag your mouse, then you should see your brush increasing, or decreasing. If you're on Mac, then it's CMD + Alt instead.
Comments
There is no feature currently, that allows you to curve a straight line, similarly to the shift + drag method you mention.