# Appendices

Note

Contributors please include appendices as needed or appropriate with your bug fixes, feature additions and tests.

- Image file formats
  - Fully supported formats
  - Read-only formats
  - Write-only formats
  - Identify-only formats
- Text anchors
  - Specifying an anchor
  - Quick reference
  - Horizontal anchor alignment
  - Vertical anchor alignment
  - Examples
- Writing Your Own Image Plugin
  - Example
  - The `tile` attribute
- Decoders
  - The raw decoder
  - Decoding floating point data
  - The bit decoder
- Writing Your Own File Codec in C
  - Setup
  - Transforming
  - Cleanup
- Writing Your Own File Codec in Python