The Settings option inside the User Menu on Free Map Tools can be used to change the appearance of the markers on the map. You can adjust the size of the markers by selecting Large, Medium or Small. You can also change the opacity of the marker using the slider. A preview marker is displayed on the Settings window. Once you have the correct settings, click Apply. If you do not want to make any changes, click Cancel.
This example below is taken fromĀ Measure Distance Map