Cursor Down (CUD) - Ghostty Org

The parameter n must be an integer greater than or equal to 1. If n is less than or equal to 0, adjust n to be 1. If n is omitted, n defaults to 1.

This sequence always unsets the pending wrap state.

If the current cursor position is at or above the bottom margin, the lowest point the cursor can move is the bottom margin. If the current cursor position is below the bottom margin, the lowest point the cursor can move is the final row.

This sequence never triggers scrolling.

Validation

CUD V-1: Cursor Down

bash

printf "A"
printf "\033[2B" # cursor down
printf "X"

|A_________|
|__________|
|_Xc_______|

CUD V-2: Cursor Down Above Bottom Margin

bash

printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "\n\n\n\n" # screen is 4 high
printf "\033[1;3r" # set scrolling region
printf "A"
printf "\033[5B" # cursor down
printf "X"

|A_________|
|__________|
|_Xc_______|
|__________|

CUD V-3: Cursor Down Below Bottom Margin

bash

printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "\n\n\n\n\n" # screen is 5 high
printf "\033[1;3r" # set scrolling region
printf "A"
printf "\033[4;1H" # move below region
printf "\033[5B" # cursor down
printf "X"

|A_________|
|__________|
|__________|
|__________|
|_Xc_______|