Use the box zoom tool from the toolbar to enlarge the view so that a selected area fills the viewport.
To zoom in to a selected area of the view:
From the toolbar, click the box zoom tool to enter zoom mode.
Tip: You can also select ViewBox Zoom from the main menu or press [F5].
Position the cursor in the viewport whose view you want to change.
The cursor shape changes to crosshairs.
Position the cursor at one corner of the area to be enlarged.
Drag the cursor to the opposite corner.
A rectangle indicates the area to be enlarged.
Release mouse button 1.
The area defined by the rectangle enlarges to fill the viewport.
Repeat Steps 2 through 5 as many times as necessary to achieve the desired view.