Scroll Documents can be configured to be used only in selected spaces by Confluence administrators. This allows to control the usage of the app to prevent unaware users from creating documents by accident.
To change these settings, navigate to General configuration > Scroll Documents > Settings.
Enabling and disabling usage in spaces
The space access settings can act as an allow list or a deny list by selecting either Enable or Disable in the dropdown:
Enable: Scroll Documents can be used only in the spaces selected in the space key picker. All other spaces will not have access to the app.
Disable: Scroll Documents cannot be used in the spaces selected in the space key picker. All other spaces will have access to the app.
The text below the space key picker will give you a summary of the currently selected options.