Also, when I've scrolled say 1 1/2 page, how do I center the cursor on the visible area!?
There's no way to do that - but it sounds like a candidate for the to-do list (as I also frequently scroll w/o moving caret myself, and fallback to actually position the caret with the mouse, somehow it never occurred to me that this could be a key action).
WOW!
Just noticed that in Rev. 948 we now have
[NEW] The Navigation menu has a Go to Middle Visible Line action (shift-cmd J) which moves the caret to the line which is vertically centered.
Thanks Allan!!!
best D