Arrow Tool Modifiers
The Drawing Tools Modifiers (Options): These are located at the bottom
of the Drawing Tools Toolbar. The modifiers affect how tools will act when used.
Modifiers change based on the tool that is selected and, in some cases, are
only available when an object has also been selected with that tool. When modifiers
are unavailable, they will appear grayed out.
Brush Tool Modifiers
You can see that the options for the brush tool are quite different from the options for the arrow tool.
The help documents in Flash are an excellent resource for learning about these advanced options.