At the bottom left is a tab called Layers. Click on that. Then check off the items you want to see. I was looking for a possible trail route, so I selected Elevation and Contours, plus Parcel boundaries. Then I clicked on Filter (upper left). Again, this is a little slow to refresh. Be patient. Then you should see the contour details.
If you haven’t used it, here’s how. Go to the Maps Page and click on Property Viewer. It will take a minute or two to load. Move the map around and zoom in on the area you want.