Most analyses can be performed on both main-level and series-level data. Which data should be used can be specified under the "Data model" dropdown menu in each analysis.
To make a variable within a series available for analysis on the main level, an aggregation variable has to be selected by adding an aggregation rule to your series. When one or more aggregation variables are selected within a series, they will display in the dataset window. These values will also be available for statistical analysis and graphical presentation.