How I can transform (Scale, Rotate..) chained layers in Gimp 2.10 simultaneously? For example, I set chain icon to 2 or more layers and want scale them like one merged layer.
That's the purpose of the chained items. Caveat: the transform tool (scale/rotate/etc...) only previews the active one, the others are scaled/rotated when you commit the transform.
- Create a layer with everything using
Layer>New from visible
- Chain that layer and the other layers
- Apply the transform to the new layer, and commit when it looks good.
- Delete that new layer, the other layers should have been transformed too.