Hello Sara,
this is possible and easy to do. You can use the Bookmark.saveBokmark() method everywhere you need, and in your case you would need to put this into the "onSelect" event on your dropdown.
eg.
Bookmark.saveBookmark("My Bookmark Title");
what you need to look at is the title, which is optional - so if you want to have a bokmark per dropdown entry, you probably need something like this - this is required as bookmarks with same title will be overwritten.
eg.
Bookmark.saveBookmark(DROPDOWN_1.getSelectedText());
and, after saving, you need also to reload all bookmarks:
var bookmarks = Bookmark.getAllBookmarks();
DROPDOWN_2.removeAllItems();
bookmarks.forEach(function(element, index) {
DROPDOWN_2.addItem(element.name, element.text);
});
this should help you, please refer also to the documentation on bookmarks which is available online (SAP BusinessObjects Design Studio 1.3 SP01 – SAP Help Portal Page) or in the designer.
Karol