The Main Jamm Interface contains a set of Global Controls which are present on all screens, including the Screen Selectors at the bottom. The Screen Selectors select between the main Screens and Modules which offer different functions of which the Play Screen is the most important.
This manual is an addition to the comprehensive InApp Help available for any screen from the top right Help icon. Use this Help first which has a description of every control in the app. The manual is more in the nature of overviews of the different modules and functions.–https://jammpro.net/manual/https://jammpro.net/manual/