Besides being able to easily adjust the size of symbols by using the black control handles, like you can in all SmartDraw visuals, you can also manually adjust the size and spacing of the spine and branches of your cause and effect diagram. Click on a branch and you'll see black squares appear where the details are connected to it. You can drag these black squares to adjust the spacing of your selected branch and the spacing of the other the branches will adjust accordingly to maintain an even look. If you select the spine of your cause and effect diagram, you can adjust the spacing between all the branches. On the spine, you'll also have an additional control a white diamond or circle that can adjust the space between all the causes attached to the spine.