Hy armin unruh, thank you so much for your return.
I've tried several codes, CSS and HTML with the link you gave me, but at the moment none seem to work. The reaction time is a bit long with WP Google Map so I'll wait and tell you.
Also, another topic, I finished the first map with the Openstreetmap basemap.
Now, I would like to create a map (modified on photoshop) and integrate it on the Laytheme site and then make it interactive by adding sound.
WP Google Map doesn't offer this option to insert your own basemap, so I was wondering if there was a way to do it on Laytheme actually, since this theme is very powerful. Otherwise I can go through Draw attention, the extension. But while I'm at putting code, I think that maybe Laytheme can do it? What do you think? What would be the code to add sound?
Thank you a lot for your help!
Helena