Delta_G, I reported your comment to the moderator. If I misread, that's one thing, but I did not ask for your judgement of my reading ability.
Aside from that...
It does not appear to accept any less than 4 in "console.lines=". If I type in less, and save it, it reverts.
From a UI standpoint, why inhibit the user?
[At times, on a 16x9 aspect screen, I wish I could use this space for viewing my code.]