A context or unit mapping can be changed directly from the Current Mapping tab in the Review pane.
To change a context or unit.
Select the Review tab.
From the Review pane, click to display the list view.
Select the mapped item.
Select the Current Mapping tab.
In Context drop down, select the context.
In the Unit drop-down, select the unit.
To change a context or unit.
to display the list view.