Artboards can be created with new documents or added to your current document at a preset or custom size at any time.
When creating a new document, you can automatically create your first artboard using the settings in the New Document dialog.
Once you have an document open, you can add artboards using the Artboard Tool.
Artboards can be created:
Artboards can be deleted from your project at any time. Any objects placed on the artboard will be deleted as well.
As an alternative to deleting an artboard, you can convert it into a standard object. In this situation, any objects on the artboard will be nested within the new object, thereby preserving your design.