Toolbox
The toolbox is simply where the collection of tools can be accessed in one location. The toolbox will look like the illustration, with the 'new document' information being changed as needed. 
Heading
The text heasding indicates which letter can be used in the toolbox.
(i.e. - new document, clipboard etc.)
Select tool
When you click on the select tool sign, a popup menu will 'pop-up'. From this list the designer
can select which toolbox-layer you want to use.
Close
When this is clicked, it will close the toolbox. To make it visible again, click View -> Toolbox
Layers in the toolbox: