The Home tab > Simulation panel > Show menu > Region of Interest option enables you to limit the portion of the part that is rendered during a 3D or Rapidcut simulation. There are two main reasons to do this:
There are three different types of region:
Stock — This is the default type of simulation where the entire stock is rendered during simulation:
Feature — Select the name of the feature from the list and a region around the feature is selected as the region.
XYZ Location — The region is defined by either a box you drag or by two points whose coordinates you can enter.