Some of Euclid Studio's features involve setting up connections to databases, running flows from the cloud, or sending out emails on flow completion.
To set up a flow, you'll need to first add nodes to the Canvas (the large grid in the center of your screen).
To add a node to the Canvas, click on the Nodes menu on the pane on the left side of the screen, and then click on a specific node type to add it.
See the following articles for more detail:
Flow Templates
A set of template flow files are included with a Euclid Studio installation. To save development time, these templates can be used as a starting point for any new flow files.