How to MIRROR OBJECTS in Blender - Mirror modifier }
modeling - How to mirror selection without adding new polygons/vertices - Blender Stack Exchange
Mirror modifier left a seam in the middle? : r/blender
Selecting — Blender Manual
How to mirror in Blender?
Mirror: Mirroring an Object in Blender: A Step-by-Step Guide
modifiers - I'm trying to make a vertex group on one side of a model, but the selection keeps mirroring on the other side too. How do I stop this? - Blender