The last icon is for a popup menu. It contains the various stylesheets for ClarisWorks. You can use the ones that are provided or create your own custom stylesheets. The lower left corner has the icons for the zoom boxes. The number on the left represents the size of the document.
Smaller numbers means the document has been reduced.
Larger numbers means its been magnified. The number is a pop-up menu. Select it and a menu appears to easily let you change your document size. The second icon reduces your view of a document. The third magnifies the size of your document.