Creating visuals with optional dimensions
  
  
  
    - 
        Open a new dashboard.
      
 - 
        Click New Visual.
      
 - 
        Select the World Life Expectancy dataset in the Data
          menu.
      
 - 
        Select the Table visual type in the
            Visuals menu.
      
 - 
        Populate the shelves of the visual:
        
          
            - From Dimension, select and move 
un_region and
              un_subregion fields onto the Dimension
              shelf. 
            - From Measures, select and move 
population
              field onto the Measures shelf. 
            - From Dimensions, select and move 
year field
              onto the Filters shelf. 
            - On the Filters shelf, select 
year field,
              choose Pick values from a list, select 2000,
              and click SAVE. 
          
          
            
          
         
       - 
        From Dimensions, select and move the 
country
          field to the Dimension shelf.
       - 
        On the Dimensions shelf, click 
country
          field.
       - 
        In the FIELD PROPERTIES menu, select [ ] Enter/Edit
            Expression.
        
      
 - 
        In the Enter/Edit Expression modal window, change the text to
          the following expression: 
[<<dim:>>]
        
       - 
        Click VALIDATE & SAVE.
      
 - 
        Click REFRESH VISUAL.
      
 - 
        Change the name of the visual to Regional Populations.
      
 - 
        Click SAVE.