The configuration is composed of different tabs grouping specific configurations. No matter the tab you will find some general actions allowing you to save the configuration and test the sending.
Save: Save the configuration page and return to the AcyMailing Dashboard
Send a test: Save the configuration page and send a test e-mail to the currently logged in user (you!) using your configuration. This button enables you to make sure you can send e-mails using AcyMailing.
Each tab will allow you to configure a specific part of AcyMailing.