To change settings for the CreateSampleLine command, expand the Commands collection in the Sample Line collection and right-click the CreateSampleLine command.
The default styles and name format settings for sample line commands are described in this topic. Drawing ambient settings are described in Ambient Settings Tab (Drawing Settings Dialog Box).
In the Edit Feature Setting - Sample Line dialog box, note that appears next to the settings for default styles and default name format, marking them as specific to sample lines.