A strange behaviour happens when I move up or down the point (using the keyboard): Emacs automatically scrolls up or down whenever I pass a certain line threshold. See here:
When moving down, at line 20 the scroll locks (until I reach the end of the buffer). When moving up, the threshold is at line 10.
I would like to disable this scroll locking. That is, I would wish the point could move to the top or bottom of the screen withoug auto-locking the scroll. Any ideas? (Using GNU Emacs 24.4.4 in Linux and Mac.)