Zoom in to get a better look at the map. Use the [+] and [-] buttons, scroll with your mouse, or pinch with your fingers if you are on a touch screen.
Once you click or tap to place a marker you can drag it to reposition it.
You can see all other users markers on the User Markers tab. Click items on the list to zoom to that marker. You can also click other users markers on the map to find them on the list.
You can show and hide the markers from other users on the User Markers tab for a cleaner view.
Use the reset button to zoom the map back to a view of the whole town.