Describes the console.

Console panel

Situated at the bottom of the app builder is the console panel. By clicking on it, you can expand this panel. Within the console, you have the ability to execute scripts using the Javascript API of the platform. The results of these script executions will be displayed on the right side of this panel. This feature proves highly valuable for testing scripts prior to implementing them in other parts of your app.

Utilize the keyboard shortcut alt + down arrow to expand or collapse the console panel.
Pressing ctrl + enter allows you to execute scripts directly in the console.