If you want to place a line, select Line/Arc Continuous (or Line) on the Draw toolbar. Then, select a point on the drawing sheet to indicate where to start the line. Select a second point to indicate where to end the line. If you do not want to place another line, right-click to end the operation.
You can also place the line by selecting Line/Arc Continuous (or Line) and then selecting and dragging the pointer. When you release the mouse, the line appears on the drawing sheet.
If you want to place a precise line, you can select Line/Arc Continuous (or Line), type values into the ribbon that appears, and then press ENTER. You then select the drawing sheet to place the line.
You can also use a combination of selects and ribbon input to place the line. For example, you can type a line length in the ribbon box to lock the length value and then set the line's orientation angle graphically. You can set the color and line type by selecting a style in the Style list box.