The line is the most basic and common object in AutoCAD drawings. To draw a line, click the Line tool. Alternatively, you can type LINE or just L in the Command window, and then press Enter or the Spacebar. Notice the prompt in the Comm…

Some people like working with grid lines as a reference, while others prefer working in a blank area. To turn off the grid display, press F7. Even with the grid turned off, you can force your cursor to snap to grid increments by pressing F9.

Lines can serve as reference and construction geometry such as 1. Property line setbacks 2. The mirror line of a symmetrical mechanical part 3. Clearance lines to avoid interferences 4. Traversal path lines