Select  Preview canvas to get a preview of the entire canvas.

1. Fit to screen
   Scales the screen to show all content on the canvas.
2. Default
   Sets the screen back to the original scale and position.
3. Zoom out
4. Zoom in
5. Blue rectangle area
   Shows the area visible on the screen.
6. Default area
   Outlines the original scale and position of the whiteboard. To show/hide the default area outline, go to  Menu >  Settings > General > Outline default area.