The simplest way would be to use a “Portlet > Portlet Simple Link” that will switch the target view when it is clicked.
For example, copy + paste this fragment into your page:
<control component-type='com.webmethods.caf.faces.component.portleturl.PortletUrlLink' renderer-type='javax.faces.Link'>
<property name='id' value='portletUrlLink' />
<facet name='href'>
<control component-type='com.webmethods.caf.faces.component.portleturl.ExtendedPortletUrl' renderer-type=''>
<property name='id' value='extendedPortletUrl' />
<property name='targetView' value='/MyPortlet/myotherview.view' />
</control>
</facet>
<control component-type='javax.faces.HtmlOutputText' renderer-type='javax.faces.Text'>
<property name='id' value='htmlOutputText3' />
<property name='raw' value='true' />
<property name='value' value='Click to switch to second view' />
</control>
</control>
#webMethods-BPMS#webMethods#MWS-CAF-Task-Engine