n is either 1 (true) or 0 (false). The default value is 1.
When LineRecall is enabled (n = 1), both READ commands and command prompts can use the line recall feature. When not enabled, only command prompts can use line recall.
Changing This Parameter
On the Compatibility page of the Management Portal (System Administration > Configuration > Additional Settings > Compatibility), in the LineRecall row, click Edit. Select LineRecall to enable this setting.
To change this parameter for a single process only (as opposed to instance-wide), use the LineRecall()Opens in a new tab method of the %SYSTEM.ProcessOpens in a new tab class. See the class reference for details.