# Layer Config

- Projection
- Position
- History

### perspective

Controls which projection is applied by default when creating a new layer. When perspective is set to no, an orthographic projection is applied.

    Example: <layer perspective="yes"/> (default)
    (defined in GAMGI_MESA_LAYER_PERSPECTIVE)
    Allowed values: yes, no (optional)

### near, far, top

Set the projection volume dimensions that are applied by default, when creating a new layer. near and near mark the minimum and maximum distance from the observer for objects to be visible. near must be smaller than far.

    Example: <layer near="1.0" far="1000.0" top="0.5"/> (default)
    (defined in GAMGI_MESA_LAYER_NEAR, GAMGI_MESA_LAYER_FAR
    and GAMGI_MESA_LAYER_TOP)
    Allowed values: positive real (optional)

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