A viewport is a rectangular area on the screen whose position and size you can define. Specific parts of your drawing can be displayed in the viewports. This then enables you to study the drawing or add information with greater ease and accuracy. You can create up to 16 viewports but usually between 2 and 6 are sufficient.

The viewports are identified by a number in the top right hand corner. You will notice one is in inverse video -- this is the current viewport. All window functions operate on the current viewport, for example, if you click New and make a box in any viewport, the new view will be drawn in the current viewport. Any viewport can be made current by clicking its identification number on the screen.