DECALN—Screen Alignment Pattern

This control function fills the complete screen area with a test pattern used for adjusting screen alignment. Normally, only manufacturing and service personnel would use DECALN.

Format

ESC 1/11

# 2/3

8 3/8

Notes on DECALN

DECALN sets the margins to the extremes of the page, and moves the cursor to the home position.

Also see the screen alignment in Chapter 2.