Working with viewports
To create a viewport,
1. Click View and then, in the Window group, click the arrow next to 
New.
New.2. Do one of the following:
◦ Click Standard to create a standard viewport.
Standard to create a standard viewport.◦ Click Selected to create a customized viewport where you can specify the viewport's name.
3. Click OK
.
.To close a viewport,
Click the viewport's close button.