How to create Keepout Shapes and define Constraint Regions?

Starting SPB 23.1, OrCAD X Presto provides a streamlined workflow to add these two features to your design easily. 

First, you need to locate the Add Shape icon on your floating menu. 

Once you click on it, you will see a small panel with some options for the new shape that you will create: 

You can choose your shape to be a rectangle, circle, or polygon. But the important parameter is Shape Use. Among other options, it will display both keepout and constraint uses:  

If you choose to create a keepout shape, you will get the option to select the layer that it will apply to (it can be all of them). Then, you will be able to select the objects that the shape will restrict. For example, you can select to create a keepout rectangle on the Top layer for Traces:  

As a result, a DRC will be generated when a trace crosses such a shape:  

Now, if you select Constraint Region in Shape Use, you will get the option to select what layer it will apply to, and which rule set to enforce:  

In the previous example, the two available rule sets set the trace width to specific values. In the following image, see how the line segment width changes inside and outside the shape: