In the Title Explorer, select the location in which you want to add a shape, line or arrow.
On the Insert ribbon, click 
Shape/Lines in the Add Image group and select the desired shape, line or arrow. Select from Lines and Arrows, Basic Shapes, Block Arrows, Triangles, Trapezoids, Parallelograms, Stars, and Callouts. Your cursor changes to the drawing cursor.
Using the drawing cursor, draw a rectangle within your work area by clicking, and while holding down the left mouse button, dragging the cursor to define a rectangle. The rectangle you draw defines the size of the shape, line, or arrow you are adding. When you release the left mouse button, the shape, line, or arrow will appear in the work-area. To draw a straight line, select a line in the Lines and Arrows group, press and hold Shift, and then use the mouse as usual to draw the line.
Use the adjustment adorners to stretch, resize, flip, and rotate the object. To stretch the object, hover-over the appropriate square side adorner until the cursor changes to the double-arrows. Then click-down and move the adorner in the appropriate direction. To resize the object, hover-over the corresponding round corner adorner until the cursor changes to the double-arrows. Then click-down and move the adorner in the appropriate direction. To flip the object, hover-over the corresponding corner round adorner until the cursor changes to the double-arrows. Then click-down and move the adorner over the object and to the desired flipped position. To rotate the object, hover-over the top green adorner until the cursor changes to the circular arrows. Then click-down and move the adorner in the appropriate direction.
