Can you see it? Yeah that little check-box sitting in the Properties Inspector. Yup that’s right, it’s the Visible property and at long last we can set it from the IDE rather than having to use ActionScript.
Okay I know you can just as easily set a display object’s Alpha property instead, but setting Visible to false provides much faster rendering performance compared to setting Alpha to 0%. And remember, if you’re targeting mobile or tablet devices then every CPU cycle counts.
I’m not entirely sure why it took so long to see this feature in Flash, but kudos to Adobe for making it part of CS5.5. Oh and if you’re planning to use it, you’ll need to target Flash Player 10.2 or above.