You can specify - through Predefined Config - the visibility and of the Dashboard; options are: Visible (default), Minimised (just the instance name is shown) and Hidden.
Minimise / maximise the Dashboard by clicking the cheveron in the Home Toolbar. Or you can show / hide the Dashboard through the Column Menu.
In this example we have set the Dashboard to be Minimised at startup.
Note: we have also set the name of the Toolbar to 'AdapTable Toolbar' (via the HomeToolbarTitle property in Dashboard Config. (If not set, it defaults to the 'adptableId' property in Adaptable Options).