This is available since the version 1.5.
To display a page thumbnail, overriding the page thumbnail default option in the directory style, for the specified workstate:
<l:PagePreview
VerticalAlignment="Center"
Stretch="Uniform"
PageId="{Binding Path=[page.id]}"
OptionsName="{Binding Path=[page.workstateRef.name]}"
/>
The above statement tells the directory style to load (generate) the page thumbnail according to the preview option named as the current page work state.
If the page has the work state "Not ready" and there exists in the database the configuration "ppopt_Not ready", it is used, instead of the default one defined in the EditorialConfig.
If the specified configuration does not exist, the default is used.
See also
Page thumbnail default option in EditorialConfig
Page thumbnail options file structure
Creating custom preview options based on page work state