How we can merge edges in blender - Modeling - Blender Artists
modeling - Bevel vertices on a flat plane - Blender Stack Exchange
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Bevel Edges — Blender Manual
Create a plane with Rounded Edges in Blender 2.80
Help beveling an edge : r/blenderhelp
How do I bevel this edge? I want it rounded, it's too sharp now
edit mode - Why does my Bevel move vertices along the edges
Dev:Source/Modeling/Bevel - wiki