I would like to download a map from the internet to show during Pastor's presentation this Sunday. How do I do that?

Depends on the website you want to get it from. Some sites will have download links to use to obtain the image of the map. If they don't you would need to right click on the image and select Save Image As, Save Link As, etc. to save the map image to your computer. Please remember that EW will only display standard Images such as JPG, GIF, PNG, etc.