Regions are sub-volumes of datasets. Regions are a hierarchical level in AcuFieldView below dataset but above grids, surfaces and rakes.

The region definition can be used to group grids, change the coordinate system available for the dataset in AcuFieldView, and change characteristics of the dataset coordinates. In addition, the file is used to pass blade row information for turbomachinery applications.

The Region Controls panel allows you to select a region similar to the way that datasets can be modified with the Dataset Controls panel. This menu item is only available if a valid .FVREG file has been defined for the current dataset.