I'm trying something that I managed before, but not anymore.
I have a subdiveded flat plane (which represents a grid) where I want to make a few more holes (see picture one).
If I select the vertices and then do Ctrl + Shift + B, I don't get rounded corners but straight (see picture two).
My question is what am I doing wrong?
I'm using Blender 2.79, and I'm a beginner.