Here you can specify how many lines of text, counted from the bottom edge of the window, should be visible at its top edge when scrolling.
In addition you can also set the behaviour of the editor when
scrolling to the end of the text. With Only up to last line
selected, Eddie, when it reaches the end of the text, will fill the
window with text in such a way that the last text line will correspond
to the last line in the window. Otherwise scrolling will be as normal
with the set overlap, which may lead to a larger empty area on the
last page.
