# Special notes

Source: https://ref.dm-lang.org/notes/

This section of the reference should help explain some concepts that may be harder to understand or that can use more clarification.

## Pages

- [BACKGROUND_LAYER](https://ref.dm-lang.org/notes/BACKGROUND_LAYER.md)
- [Big icons](https://ref.dm-lang.org/notes/big-icons.md)
- [Color gradient](https://ref.dm-lang.org/notes/color-gradient.md)
- [Color matrix](https://ref.dm-lang.org/notes/color-matrix.md)
- [EFFECTS_LAYER](https://ref.dm-lang.org/notes/EFFECTS_LAYER.md)
- [Filter effects](https://ref.dm-lang.org/notes/filters/index.md)
- [Generators](https://ref.dm-lang.org/notes/generators.md)
- [Gliding](https://ref.dm-lang.org/notes/gliding.md)
- [HUD / screen objects](https://ref.dm-lang.org/notes/HUD.md)
- [Isometric maps](https://ref.dm-lang.org/notes/isometric.md)
- [Numbers](https://ref.dm-lang.org/notes/numbers.md)
- [Particle effects](https://ref.dm-lang.org/notes/particles.md)
- [Pixel movement](https://ref.dm-lang.org/notes/pixel-movement.md)
- [Projection matrix](https://ref.dm-lang.org/notes/projection-matrix.md)
- [Regular expressions](https://ref.dm-lang.org/notes/regex.md)
- [Understanding the renderer](https://ref.dm-lang.org/notes/renderer.md)
- [Side-view maps](https://ref.dm-lang.org/notes/side.md)
- [Tiled icons](https://ref.dm-lang.org/notes/tiled-icons.md)
- [Topdown maps](https://ref.dm-lang.org/notes/topdown.md)
- [TOPDOWN_LAYER](https://ref.dm-lang.org/notes/TOPDOWN_LAYER.md)
- [Unicode](https://ref.dm-lang.org/notes/Unicode.md)