In Dashboards tab, select “Add a Chart”

Then “Create new chart”

Then select “Comparison Chart”

Select the data or metric you wish to compare, or use “Formula” to build  new data set.  Note - if using a formula, you may want to create it in the metric library to make it easier to re-select for each year and/or other charts.  See How do I create a new metric in the metric library?   Type in the search box to find the desired account, metric, or other data point.

For each data point, select your year and display criteria.