There was a keyboard shortcut Shift+Z to add a file to another location (i.e. create a hard-link). Not sure if it still works. The sidebar also has a list of lo

There was a keyboard shortcut Shift+Z to add a file to another location (i.e. create a hard-link). Not sure if it still works. The sidebar also has a list of locations that a file is in. Also there are public APIs and documentation for everything.