To create a marker, left-click anywhere on the map.
You can also enter any address using the input field.
To show information about a marker, left-click on it.
To view all created markers, fit the map to them.
To remove a marker, right-click on it.
You can also remove a marker, using the info window button.
To remove all markers, use button placed on top panel.
Use the info window buttons to select the points between which the distance will be calculated.
If you want to deselect the marker use the info window button or just select another one.
When you select 2 markers you can calculate the distance between them.