For instance, the WSR-88D radar sites are stored as points. Highways are stored as lines, and CWAs are stored as polygons. The actual shape file that holds the data is 252Kb. Once you have the file available on the PC go ahead and start up ArcView. Note, that in the case of the interstate highways, this file already came with the ArcView 3.1 installation and is called roads.shp and can be found in the Esridata-USA directory where your other ArcView files are located.
Next step go ahead and use the mouse to select a portion of the map of interest.
In this case we will focus on the state of Texas. When you reach your final desired end point just double-click that point. After the data files are saved you'll be asked to save the project. If you intend to ever edit this shapefile again in the future you may want to save it as a project. It just makes it a little easier to reopen the project file rather than having to trace back through all the steps above again.