There are two tools for drawing lines, curves, and irregular shapes: the Freehand tool
The Freehand tool provides the most straightforward method for drawing. It lets you draw by dragging the mouse cursor across the page like a pencil on paper. This method is closest to traditional drawing, but the results are often imprecise and rough. You can improve these results by adjusting the default settings or by editing the curve after you have drawn it.
The Bezier tool lets you draw smooth, precise curves node by node. When you use the Bezier tool, each click of the mouse places a node, and each node is connected to the previous node by a segment. Also, when you place a node, you can control the curvature of the segment you are drawing by positioning the node's control points (dotted lines that extend in opposite directions from the node). By using control points and by placing each node individually, you can create precise lines and curves.
How to
To draw a curve or a straight line connected to another
Related topics
Drawing basic shapes