Zooming in and out of the diagram. The zoom feature allows you to reduce or enlarge the size of your diagram to get a closer view or to see more of the diagram at a reduced size. You can change the zoom value using the Zoom Value drop-down list on the Editor toolbar. To scale the diagram to fit the window, click Fit Diagram. To scale the diagram width to fit the window width, click the Fit Width button.
Note that the minimum scale size is 33% and some large diagrams might not fit entirely the window.
To change the scale do one of the following:
Click Zoom In or Zoom Out button on the toolbar.
Click Fit Diagram button on the toolbar to scale the diagram to fit the window.
Click Fit Width button on the toolbar to scale the diagram width to fit the window.
Turn on the Navigation Mode on the toolbar, then you can zoom in and out using the mouse wheel.