It is possible to use Prism without the Toolbar (top) and Navigator (left), and this can be useful on computers with  tiny screens. But it is easier to learn Prism with both the Toolbar and Navigator showing. If someone else using the computer has turned off either, it is easy to bring it back:

•If the toolbar is not showing on your computer, drop the View menu and choose Main Toolbar.

•If the Navigator is not showing on your computer, drop the View menu and choose Navigator.

•If the bottom toolbar is missing, choose Bottom Toolbar on the View menu.