Is it possible to establish any relative link on presentation object (LO Impress) to the other .odp file located in the same directory, as the active file? I want to prepare a few presentations and copy them on pen drive. It would be very comfortable if I could open the chosen one by clicking on the appropriate object in the active presentation… therefore, I would like to avoid providing the exact path. Thank for help in advance 
Thank you very much m.a.rosiv, it works but direct link is still shown as an exact path - it fooled me. My mistake.
Have you tried with Menu/Tools/Options/Load/Save - General - Save - Save URLs relative to file system?