To edit your profile, go to your profile, and you'll find an "edit" button on the bottom left corner of the screen.  Click it, make the changes, and then click "save".  It's that simple.  As far as editing your portfolio, you can't recreate your own actual portfolio here, because you can't choose entry and exit prices, or weightings.  Everything is equal weighted, and all prices are the market's closing prices at the end of the current (or next) trading day.  You can choose the same companies that you actually own in real life, but that won't always be advantageous, especially if you bought those companies at much lower prices.  You can close a position, but that position remains on your scorecard.  Hope that helps.  Best to treat this as a game.  You are creating a fantasy portfolio using the rules that exist here.