Variable: term-scroll-start
term-scroll-start is a buffer-local variable defined in term.el.gz.
Documentation
Top-most line (inclusive) of the scrolling region.
term-scroll-start must be in the range [0,term-height). In addition, its
value has to be smaller than term-scroll-end, i.e. one line scroll regions are
not allowed.
Source Code
;; Defined in /usr/src/emacs/lisp/term.el.gz
(defvar-local term-scroll-start 0
"Top-most line (inclusive) of the scrolling region.
`term-scroll-start' must be in the range [0,term-height). In addition, its
value has to be smaller than `term-scroll-end', i.e. one line scroll regions are
not allowed.")