hello,
I would like to use marble for reporting experimental sites for a scientific paper.
I'm new in marble so please excuse this very naive question :
how is it possible to save and load placemarks?
I tried to save them with "save annotations" but it creates a xml files that I cannot load latter (it looks like marble require kml or osm file, not xml)
Thank you for your help
regards

There are two panels (hidden by default) that are useful in this context: Files and Edit Map. You can access them via Settings => Panels in the main menu.