![Print Print](https://www.e-education.psu.edu/geog863_gmaps/sites/all/modules/print/icons/print_icon.png)
In this lesson, you've seen how to modify the Google Maps user interface and basemap, open info windows when markers are clicked, implement a custom marker icon, and code the addition of line and polygon overlays. To this point, we've only dealt with a small number of points and have been able to hard-code their locations in our JavaScript code.
In the next lesson, you'll learn how to handle a larger volume of data than can be hard-coded into your page. You'll also learn how to add a sidebar that lists the names of your features and how to use the API's address geocoder.