# ShapeCollection
### Introduction
The FlatRedBall Editor supports creating objects of type ShapeCollection.
Note that entities which are created as ICollidable automatically have a ShapeCollection named Collision, and all shapes shapes are added to the default Collision shape collection. In this case you do not need to manually create a ShapeCollection. For more information, see the [Implements ICollidable](https://docs.flatredball.com/flatredball/glue-reference/entities/glue-reference-implements-icollidable) page.
### Adding a ShapeCollection
To add a ShapeCollection:
1. Right-click on Objects under a Screen or Entity
2. Select **Add Object**
3. Verify that **FlatRedBall or Custom Type** is selected.
4. Select **ShapeCollection**
5. Click **OK**
Add a ShapeCollection through the New Object window
Note that FlatRedBall also supports the .shcx file format, but this is no longer recommended. The PolygonEditor tool is no longer maintained, and the recommended approach is to add a ShapeCollection as shown above and to modify the shapes using FlatRedBall's LiveEdit.
### Adding Shapes to a ShapeCollection in FlatRedBall
ShapeCollections can have shapes added manually. The ShapeCollection serves as a "list" of shapes, but unlike normal lists, the ShapeCollection can contain multiple types of objects.
To add a new shape to the ShapeCollection:
1. Right-click on the ShapeCollection instance
2. Select **Add Object**
3. Select one of the shapes - notice that FlatRedBall filters the available types to the types allowed in a ShapeCollection.
4. Click OK
Your newly-created shape is added to ShapeCollection in the tree view.
New AxisAlignedRectangle in ShapeCollection
### ShapeCollection in code
For information on how to work with a ShapeCollection in code, see [the ShapeCollection page](https://github.com/flatredball/FlatRedBallDocs/blob/main/frb/docs/index.php).
