Grouping components

<h:panelGroup> is the next new tag in the example. Typically, <h:panelGroup> is used to group several components together so that they occupy a single cell in an <h:panelGrid>. This can be accomplished by adding components inside <h:panelGroup> and adding <h:panelGroup> to <h:panelGrid>. As can be seen in the example, this particular instance of <h:panelGroup> has no child components. In this particular case, the purpose of <h:panelGroup> is to have an empty cell and have the next component, <h:commandButton>, align with all other input fields in the form.