When you are not putting your guitar on a stand and you need to put it down for a second.....is it better for the neck to lean it fretboard down or the back of the neck down? And how far down?...know what I mean?

For example my guitar is leaning against my couch right now....the fretboard is down against the couch and the point of impact against the couch (for lack of a better word) is about 1/4 way down the neck. I was also told that leaning it fretboard down lessens the risk of the tuners getting moved.

Its not like its going to sit there for a long time. Its usually on a stand, but I was told that it can effect the neck?

so which is the best way...when not using a stand. Is any of this true?

Thanks