You have noticed that text typed into the Workspace is colored and highlighted based on what you type. We will discuss this below when we talk about the Smalltalk language, but the idea is to be helpful. If you start to type a word the Cuis Workspace knows about, you can press the tab key and get a set of choices for completion of the word. Try typing Float epsi and pressing tab. You can then press enter and should see Float epsilon. Click elsewhere on the Workspace to make this menu go away.