To Open a Toolbox

Select File > Settings > User > Tool Boxes .
The Tool Boxes dialog opens. Its list box contains an entry for each available toolbox. The check box next to each entry indicates whether or not the toolbox is open.
Do one of the following:

In the list box, click (turn on) the check box for the toolbox you want to open and click OK.

or
In the list box, double-click the list box entry for the toolbox you want to open.

If the toolbox was docked the last time it was opened (or its default is to be docked), it will be automatically docked upon opening. Otherwise, the toolbox will be floated.

Tip: You can open more than one toolbox at the same time using the Tool Boxes dialog by turning on their check boxes.