Is there a way to copy bookmarks instead of moving them between folders? Say you want Group A to have bookmark 1, 2, 3, 4, 5, 6, 7, 8 and Group B to have 5, 6, 7, 10 and 9. A sensible thing would be to create two shared folders and then copy anything you want to be common. I can’t figure out how to do this.
Copying and moving bookmarks can only be done between online folders.
Bookmarks are copied by Ctrl+Shift-dragging a bookmark on top of the destination folder.
Bookmarks are moved by either Ctrl-dragging a bookmark on top of the destination folder or by changing the folder when editing the bookmark.
When using the drag method multiple bookmarks can be copied/moved in a single action. When using the drag method bookmarks of multiple source folders can be copied/moved in a single action. Selecting multiple bookmarks is done by either Ctrl-clicking individual bookmarks or, for consecutive bookmarks by clicking on the first and then Shift-clicking the last bookmark.
Source: Bookmark - EVE University Wiki