"Text is an important part of the websites. Flash provides you a lot of the control on the text you are using in flash documents. In this tutorial, you will learn the basics of the Text in Flash. In the Adobe Flash CS3, there are three types of the text, static, dynamic and input text.
Static text is used in the Title and the Label, dynamic text is used for displaying the text that changes dynamically at the runtime and the input text are used for the user activity like getting the user name and password in the Flash form.
All these types of the text, there are multiple options like Font size, font style, colors, character width, height, maximum characters, character spacing, justification, drop shadow, blur, glow and drop shadow etc. In fact, Flash allows you to produce multiple text effects that are not possible with the HTML and CSS."
you use ADOBE Help to understand the language of Flash you'll find this definition there:
The Timeline organizes and controls a document’s content over time in layers and frames. Like films, Flash documents divide lengths of time into frames. Layers are like multiple film strips stacked on top of one another, each containing a different image that appears on the Stage. The major components of the Timeline are layers, frames, and the playhead.
Layers in a document are listed in a column on the left side of the Timeline. Frames contained in each layer appear in a row to the right of the layer name. The Timeline header at the top of the Timeline indicates frame numbers. The playhead indicates the current frame displayed on the Stage. As a document plays, the playhead moves from left to right through the Timeline.
The Timeline status displayed at the bottom of the Timeline indicates the selected frame number, the current frame rate, and the elapsed time to the current frame.
The playhead moves through the timeline as a document plays to indicate the current frame displayed on the Stage. The Timeline header shows the frame numbers of the animation. To display a frame on the Stage, move the playhead to the frame in the Timeline.