You can do Side-By-Side comparison of data and see the difference between them using the Comparison View view of Progress Board.
For
...
example; if you want to compare last year
...
's results with this year
...
's results, you can use the Comparison
...
view. This view allows you to see both of the years
...
' results next to each other for easy comparison.
Steps to see Comparison View
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Using these options you can easily compare data between various years and project to see the progress and compare them.