Add to the Data View from the Local Variables View
Use the Local Variables view to add variables to the Data View, either by using the context menu or by dragging and dropping. Choose Add to Data View to add to the existing view, or Add to New Data View to create a new Data View window.
Figure 63, Add to the Data View using the context menu
Figure 64, Add to the Data View by dragging from Local Variables
As you step through your program and the focus changes, the variables are evaluated using the scope in which they were added rather than the current scope.
Figure 65, Evaluated expressions use the original scope
 
In Figure 65, the variable x was added to the Data View at two different scopes from two different, selected stack frames, so reflects a different value.
If a variable goes out of scope, an error is displayed: