# Timeline and layers

- [Overview](/timeline-and-layers/overview.md)
- [Layer types](/timeline-and-layers/layer-types.md)
- [Layer operations](/timeline-and-layers/layer-operations.md)
- [Concepts](/timeline-and-layers/layer-operations/concepts.md)
- [Regular layer's operations](/timeline-and-layers/layer-operations/regular-layers-operations.md)
- [Reference layer's operations](/timeline-and-layers/layer-operations/reference-layers-operations.md)
- [Tilemap layer's operations](/timeline-and-layers/layer-operations/tilemap-layers-operations.md)
- [Group's operations](/timeline-and-layers/layer-operations/groups-operations.md)
- [Frame operations](/timeline-and-layers/frame-operations.md)
- [Cel operations](/timeline-and-layers/cel-operations.md)