Use the controls in the lower left to draw, edit, or remove features.
Size information will be displayed while you are drawing.
Click on a drawn feature to see more details, such as the overall line slope or the elevation profile.
Enter a latitude and longitude. The map will pan to a marker placed at the location you have entered.
Mark this location
Use the "Copy URL to clipboard" button to send the current map settings, in a URL, to your clipboard.
Paste it wherever you want a link to the current map view -- e.g. in a document, web page, email...
The portion of the map that will be printed is highlighted on your display.
Pan and zoom if necessary to position the desired region inside this area.
If the legend or an elevation profile are being displayed, they will be repositioned,
if necessary, to also appear in the printout.
This only covered the basics of using this utility, more thorough help is provided through a set of tutorials.