In my poster I used the 3D effect on the arrows. Here is how I used it.
Select your object. Then select the effects tab and go to 3D –> extrude and bevel.
Set your perspective angle by typing in the degree or manually move the blue box. To see the moves, make sure the preview box is checked. Leave surface on plastic shading. When you are satisfied with the position click ok.
To change the color of the arrow, you must change the fill and stroke. If you have any questions leave me a message and I will respone.