I have heard about relative paths and I think that they are of good use. But, I do not know how how to define a relative path. For instance, I have a Power Point presentation in which I use an audio (or video) during the slide show. I place these files (the presentation itself and the audio(/video)) in a folder. I would like to copy this folder to a removable drive so that I can use it in any system, but to achieve this, I should give the file name of the audio(/video) as relative path.
How can I achieve this?