The Journals tab (left menu) lets you see detailed data on each journal.  You can show or hide data columns by clicking on the column chooser:    

You can sort by column data by clicking on the header.

You can see details on an individual journal by clicking on its row.

You can subscribe or unsubscribe from journals in the model by clicking on the shopping cart -- filled in means subscribed and just a shopping cart outline means it is currently modeled as not subscribed.