---
title: Region
description: "Converts objects that enclose an area into a 2D region object. Command line enter: Region or Reg Regions are 2D areas that you create from closed planar loops of objects. Valid objects include polylines, lines, circular arcs, circles, elliptical arcs,…"
url: "https://www.dwgsee.com/cad/support/docs/region/"
updated: "2025-01-14"
category: User Guide / Create Objects / Create Curved and Closed Geometry / About Regions
tags:
  - Regions
  - Regions and Areas
---

# Region

Converts objects that enclose an area into a 2D region object.

Command line enter: Region or Reg

Regions are 2D areas that you create from closed planar loops of objects. Valid objects include polylines, lines, circular arcs, circles, elliptical arcs, ellipses, and splines. Each closed loop is converted into a separate region. All crossing intersections and self-intersecting curves are rejected.

After you have converted objects to regions, you can combine them into a complex region using union, subtract, or intersect operations.