How to round corners?

Hello! Can someone show me best way to round these corners?



Arcade.blend (428 KB)

You can bevel selected edges http://www.blender.org/manual/interface/undo_and_redo.html?highlight=undo


You can use a bevel modifier if you’re looking for a mostly automatic way of rounding corners, also I think Richard meant to link to this.
https://www.blender.org/manual/modeling/meshes/editing/subdividing/bevel.html

Or use Spin

Thanks, i’ll try.