Working with Graphics
Strokes and Fills
Stroke (represented by the pencil icon) is an outline around a shape. To make a stroke, select the color, then the thickness. If the color is "transparent" then there is no stroke.
Fill (represented by the paint brush) is the inside color of the shape.
Building Shapes
Flash gives you several built in, basic shapes. Ovals, Rectangles, etc.
Shapes can be combined by drawing one shape over another, and then removing the parts you don't want. This is easier when the shapes have either a different color, or a stroke associated with it. Hint: You must not be in object drawing mode for this to work.
The Free Transform tool allows you to change the size of a shape.
Aligning Objects
People like symmetry. Aligning objects is one part of making items symmetrical.
Select the objects you want to align, then go to the align tool panel. (Window > Align). Click the appropriate align button, based upon how you want to align your objects.
Curves & Freeform Shapes
Flash allows you to build lines with the pencile to make freeform shapes.
Flash gives you a pen tool (a simplified version of Illustrator's pen tool) to draw curves. You can modify the curve by choosing sub sections and adjusting the handles.