In Analyze, there are two main view modes that you can work with. The first one - "Split view" and the second - "Full query/results". View mode can be set in the global settings in the "interface" section.
Sources
"Sources" field shows you which datasets are included in the current data connection.
Query area contains panels. You can drag and drop the query items from the left ribbon into them and build your analysis. Depending on chosen tab template query area may look different.