Using the toolbox:

The tools in the toolbox let you draw, select, paint, and modify artwork. Other tools let you change the view of the Stage. Most tools have modifiers that affect the painting or editing operations of the tool.

Click the tool you want to use. Depending on the tool you select, a set of modifiers are displayed at the bottom of the toolbox.

To show or hide toolbars:
Choose Window > Toolbar.