Mirror In Image Editor allows you to mirror textures within Blender's Image Editor window. It features 2D mirroring using a defined symmetry line, and 3D mirroring based on a model and world axis. The tool uses a snapshot system where changes are recorded and then mirrored according to the selected mode.

The addon includes modes to mirror changes directly or use drawn strokes as a mask for mirroring operations. An alternative 3D mirror method utilizing Blender's baking system is included. Users can visualize the 2D symmetry line in the UI and toggle texture tile wrapping during 2D operations.