To display the view for the current canvas as a 1 point black rectangle in the Layout Editor:
Resizing the View
For a content or toolbar canvas, the view rectangle represents the window to which the canvas is assigned. Resizing the view in the Layout Editor changes the Width and Height properties of the window. Conversely, changing the Width or Height properties of the window resizes the view rectangle in the Layout Editor. For a stacked canvas, the view is independent of the window in which the canvas is displayed, and its size is controlled by the Viewport Width and Viewport Height properties.
To move the view: