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# Wagtail 4.2 release notes - IN DEVELOPMENT
_Unreleased_
```{contents}
---
local:
depth: 1
---
```
## What's new
### Other features
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* Add custom permissions section to permissions documentation page (Dan Hayden)
2022-10-22 06:19:19 +02:00
* Wagtail's documentation (v2.9 to v4.0) has been updated on [Dash user contributions ](https://github.com/Kapeli/Dash-User-Contributions ) for [Dash ](https://kapeli.com/dash ) or [Zeal ](https://zealdocs.org/ ) offline docs applications (Damilola Oladele, (Mary Ayobami)
2022-08-10 05:07:27 +02:00
* Switch to using [Willow ](https://github.com/wagtail/Willow/ ) instead of Pillow for images (Darrel O'Pry)
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### Bug fixes
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* Make sure workflow timeline icons are visible in high-contrast mode (Loveth Omokaro)
2022-10-13 23:20:23 +02:00
* Ensure authentication forms (login, password reset) have a visible border in Windows high-contrast mode (Loveth Omokaro)
2022-10-14 07:09:02 +02:00
* Ensure visual consistency between buttons and links as buttons in Windows high-contrast mode (Albina Starykova)
2022-10-20 01:36:16 +02:00
* Ensure `ChooserBlock.extract_references` uses the model class, not the model string (Alex Tomkins)
2022-10-18 18:34:29 +02:00
## Upgrade considerations
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### Wagtail-specific image field (`WagtailImageField`)
The `AbstractImage` and `AbstractRendition` models use a Wagtail-specific `WagtailImageField` which extends Django's `ImageField`
to use [Willow ](https://github.com/wagtail/Willow/ ) for image file handling. This will generate a new migration if you
are using a [custom image model ](custom_image_model )
