Scroll Down (SD)

Insert `n` lines at the top of the scroll region and shift existing lines down.

  1. 0x1B
    ESC
  2. 0x5B
    [
  3. ____
    n
  4. 0x54
    T

This sequence is functionally identical to Insert Line (IL) with the cursor position set to the top of the scroll region. The cursor position after the operation must be unchanged from when SD was invoked.

This sequence unsets the pending wrap state.

Validation

SD V-1: Outside of Top/Bottom Scroll Region

printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "ABC\n"
printf "DEF\n"
printf "GHI\n"
printf "\033[3;4r" # scroll region top/bottom
printf "\033[2;2H"
printf "\033[T"

|ABC_____|
|DEF_____|
|________|
|GHI_____|

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