Final answer:
In CAD programs like AutoCAD, the TEXT or DTEXT command is used to place line text on a drawing.
Step-by-step explanation:
The command used to place line text on a drawing within most CAD (Computer-aided Design) programs is typically the TEXT or DTEXT command. In software such as AutoCAD, you can use these commands to insert single-line textual information anywhere on your drawing. You simply activate the command, click where you want the text to start, and then type your text. Once you're finished, the command places the text directly onto the drawing canvas. This feature is commonly used for adding notes, labels, or other important information that doesn't require paragraph formatting.