To resize a canvas in the Layout Editor:
1. In the Layout Editor, make sure the canvas object is displayed by choosing View and checking the Show Canvas option (the default).
2. Scroll the Layout Editor window until the lower right corner of the canvas is visible, then click on the right edge or bottom edge of the canvas to select it.When the canvas is selected, a black selection handle is displayed at its lower-right corner.
3. Click and drag the selection handle to resize the canvas as desired
