The first time you start the application, the Tools panel appears at the left side of the screen. You can move the Tools panel by dragging its title bar. You can also show or hide the Tools panel by choosing Window > Tools.
You use tools in the Tools panel to create, select, and manipulate objects in Illustrator. Some tools have options that appear when you double-click a tool. These include tools that let you use type, and select, paint, draw, sample, edit, and move images.
You can expand some tools to show hidden tools beneath them. A small triangle at the lower-right corner of the tool icon signals the presence of hidden tools. To see the name of a tool, position the pointer over it.
You can also use the Tools panel to change the drawing mode from Draw Normal to Draw Behind or Draw Inside.