Lines, arrows, and scribbles are continuous lines composed of one segment. To create them, click either the Line, Arrow, or Scribble button from your drawings toolbar, to the left of the Text box button.
After choosing which object you’d like to draw, position your mouse and click in the drawing canvas where you’d like the object to begin, move your mouse to draw, and then click to end the segment.
After you have finished drawing, you can click in the canvas again to start drawing another line of that type. If you’re done, you can press the Esc key or select another tool to deselect your object.
When you have a line, arrow, or scribble selected, three buttons appear toward the end of the toolbar that allow you to change the style of the line or the endpoints. Click the buttons and select an option from the drop-down menus to apply that style to your object.