setMargin

The setMargin command draws a vertical line in the editor. For example in, when the HLASM parser preference for showing margins is enabled, margin lines are drawn at the start of columns 72, 73 and 81.

Syntax
setMargin <number> ON|OFF
Arguments
<number>
Represents the column before which to draw a vertical line
ON
Show the line before the specified column
OFF
Hide the line before the specified column