Modifiers
Arrow Tool Modifiers
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.

Arrow Tool Modifiers
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.