How to create a 'permalink' to with a red arrow on the map?

‘Permalink’ option gives link to a desired region, but sometimes a more precise link is required. Is it possible to somehow force a red arrow (like the one that appears when clicking on ‘home’ link (or something similar)) to appear on the map?

Just found an answer on the list. mlat & mlon should be used instead of lat & lon in the resulting url. It gives a red marker on the map.