DECCOLM—Select 80 or 132 Columns per Page

There are two control functions that can set the page width to 80 or 132 columns, DECSCPP (DECSCPP—Select 80 or 132 Columns per Page) and DECCOLM.

Note

It is recommended that new applications use DECSCPP rather than DECCOLM. DECSCPP does not clear page memory or reset the scrolling regions, as does DECCOLM. DECCOLM is provided mainly for compatibility with previous products.

Default: 80 columns

Format

CSI
9/11

?
3/15

3
3/3

h
6/8

Set: 132-column font.

CSI
9/11

?
3/15

3
3/3

l
6/12

Reset: 80-column font.

Notes on DECCOLM

DECCOLM sets the number of columns on the page to 80 or 132 and selects the corresponding 80- or 132-column font.
If you change the DECCOLM setting, the terminal:
- Sets the left, right, top and bottom scrolling margins to their default positions.
- Erases all data in page memory.
DECCOLM resets vertical split screen mode (DECLRMM) to unavailable.
DECCOLM clears data from the status line if the status line is set to host-writable.