Flash CS4 is a product rich of features, but many users only know about a small subset of its capabilities. Movie Explorer is one of those features that I am going to talk about in this post.
To open the Movie Explorer panel you can just go
Window > Movie Explorer or "Alt + F3."

Let's go over the Movie Explorer UI and explain how it works:
1. Launch Flash CS4.
2. First thing you want to do is to open Movie Explorer (Window > Movie Explorer) and dock it anywhere in the UI where you can see it at all time. I usually dock it on top of the action panel as follows :

Movie explorer has 6 buttons that filters different items in your Flash Movie as follows :





And also you can customize the settings of your Movie Explorer panel by clicking on

Which should present you with

Let's assume that you have a Fla file that has the following
1. Instance of a movieclip called "MyMovie".
2. Layer 2 that called "actionscript" and has trace statement on frame 1
Please make sure to press the Actionscript, Movieclip, and Layers buttons in the Movie Explorer and you should see :

Check out the below link to see more information about Movie Explorer
Adobe Flash Movie Explorer
You can save your current workspace by
"Window > Workspace > New Workspace" and just give it a name.
Enjoy it!
Tareq