Shannon Hernandez has created a handy little Chrome extension for Google Plus lovers. “Post Editor for Google+” provides simple formatting assistance for Google+.
Post Editor for Google+ adds formatting buttons to the bottom of the post box so you can easily style your posts. It also includes a variety of symbols that you can automatically inject into your post.
Here is how it looks and works:
You can make test bold, italics, strikethrough or use symbols easily.Install the extension from here.