Hi @pfm,
Thank you for getting in touch, we do appreciate your time.
This is possible using URL Query parameters, which allow you to specify initialization options as part of your link. Specifically, you would need two in your case, one to set the marker, and the second to set the zoom level.
These parameters can be seen below:
- markerid : The marker ID to focus on
- mzoom : The map zoom level to apply
An example link for your site would be: https://fosm.de/whisky-whiskey-destillerien-weltweit-map-karte/?markerid=2310&mzoom=12
Unfortunately, we do not allow the marker to be opened automatically using this method, but we might be able to help you with this directly if you contact us on our website.
Please note, due to the mention of our Pro and Gold add-ons in your initial thread, I will need to close this thread and mark it as resolved. Although the features are not explicitly related to the Pro add-on, under the WordPress.org guidelines, we are not allowed to provide premium support via these forums.
I would recommend contacting us on our website for further assistance. This can be done from our website by clicking on Support > Support Desk > Submit a support Ticket.