Comment 542 for bug 532633

@ Webster:

" + - X " ... " ^ v X " ... " [ ] _ X " is obviously the same and the most used symbols I saw over the last years in Windows-decorations in gnome-look.org for example.

"^" means simply: up - bigger - grow
"v" means oviously: down - small - minimize

The next is the design-issue... put "v" and "^" together and you will get a "X". It contains more consistency than " + - X " ... " [ ] _ X " if we look critical over it.

Last but not least ... Imagine that " [ ] _ X " in a round button. You think it will looks fine?

But it's true. " ^ v X " is the first time I see in a default theme. Peoples who aren't familiar in changing the default-look will have to accustom to this new kind of symbols (for them), too.