I see that you are not currently registered on our forum. It only takes a second, and you can even login with your Facebook! If you would like to register now, pease click here: Register
Once registered please introduce yourself in our introduction thread which can be found here: Introduction Board
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
You asked if there was a way to only show threads you commented on and the green arrow is only on threads you commented on. As far as I know, that's as close as you're going to get to what you were asking.