Use the Pen Tool to draw curved or straight lines using a series of mouse clicks, or by clicking and dragging.
Click the Pen Tool.
On the context toolbar, choose a segment type:
Straight: To create simple straight line
segments.
Symmetric (Bézier): To create curved line
segments with control handles for precise adjustment.
Smart: Useful for tracing around curved objects
and pictures.
Click on your page where you want to start your line then:
To end the line, press Esc, double-click, or choose a different tool.