Xterm Control Sequences
ESC # 3 DEC double-height line, top half (DECDHL) ESC # 4 DEC double-height line, bottom half (DECDHL)
We display the same string in two successive lines.
xterm printf "\e#3DECDHL\n\e#4DECDHL\n" xwd -out DECDHL.xwd convert DECDHL.xwd DECDHL.png
DECDHL.ps