This document is set up to teach you about ruler lines. This text was written using the default left and right margins of 1 and 65. We didn't change any tabs here. Next, we wanted to change both margins to indent the text. We used dot commands. With dot commands, the new margins are saved when you exit and save the document.
New margins change the ruler and text. Watch the ruler line as you move the cursor through this text. WordStar will continue to hold these margins until you enter another dot command.
Margin changes bring the ruler and the text back to the default settings once again.