How to add a cyclist to the map (see below for moving a cyclist)
Click on the pin to add a new marker
Click on your position on the map to create your marker
Enter your details (ctrl+return for linebreaks)
change your icon (click on the paint pot)
upload a custom icon (how to create your own icon)
Move a cyclist
It sounds straight forward, but it's not the simple drag & drop. It's more click, drag, drop.
Click on the cyclist you want to move. Release the mouse button. Click and hold the button while moving and drop the marker at the cjyclists current position.