I think the following 3x3 box would make sense:
/+\ +++ \+/
This has the advantage it mimics squared plus (3x3 grid of +'s) and that it currently is not rendered in any meaningful way.
I think the following 3x3 box would make sense:
/+\
+++
\+/
This has the advantage it mimics squared plus (3x3 grid of +'s) and that it currently is not rendered in any meaningful way.