Step 5. In ArcGIS you can add layers several ways.
From the File pull-down menu, select
Add Data or use the Add Data Button.
Navigate to where data is stored and select "Centre.shp"
to add to your Table of Contents.
Note: If your "Countbnd.shp" file was the first layer in the table of contents, you would not be able to see the layer underneath, which in this case is the streams for Centre County. Practice moving the shape files by pulling each of the shape files to the top by holding it with the left mouse button and dragging it to the top.
Step 6. Use the Zoom In tool 
to zoom to an area of interest in the View window. This
can be done by holding down the left-mouse button,drawing a
box, then letting go of the left-mouse button to enlarge the
view. Another way to zoom in is to simply click the left-mouse
button until you are zoomed in to a desirable location.
Step 7. Use the Pan tool 
to move around in the view. In the View window click
the Left mouse button, then move the map and release the mouse
button.
Step 8. Make "Centre.shp " active
by clicking on the title in the table of contents.
Notice that when a layer is active, the "Centre.shp"
title will appear highlighted. Now that you have the "Centre.shp" active, Right Click and scroll down to
Zoom To Layer. 
. Click on this bar
and your project will zoom to that layer.
Step 9. Click on the Zoom to Full Extent button 
.This will bring you back to the full extent of
your shapefiles in the view.
Step 10. Close ArcGIS or continue with the next exercise.
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