Drag to draw the path on the slide. Here are some hints for MS PowerPoint

• Line : Drag from the start pointing to the end point. The start point will have 3 green arrow,  and the end point will have a red. 
• Curve : Click at the beginning of the line,  and then move the mouse and click again to anchor the next point.  Keep creating points until you have completely defined the curve. 
• Freeform: click for each anchor point that you want;  straight lines will appear between the anchor points. You can click and drag to create non-straight lines too.  Double -click when you are finished. 
• Scribble: The pointer changes to a pencil.  Draw on the slide with the mouse button held down. Double -click when you are finished.