With Microsoft Visio’s drawing toolbar you can create your own custom shapes and designs. This feature will allow you to more accurately illustrate the concepts that are unique to your own diagrams. For instance, if you are creating a diagram of work flow in your organization and you have unique positions to describe, you may find it very helpful to be able to create these custom shapes. Visio offers rounded corners in various angles, and you are likely to find one to suit your needs. Tips Writer Bio