The 6.9 release brings a few new features and a number of fixes. GeoTIFF sources now have a normalize option. Set normalize: false if you want your style expressions to work with raw floating point values instead of normalized values from 0 to 1. The GeoTIFF source also now uses nodata values from the source imagery – so in most cases you don't need to specify this yourself. For people configuring vector layers with styles that use custom rendering, you can now get hit detection on the rendered result. See details on these features and other included fixes below.

• #12813 - Do not replace icon color if image not loaded (@mike-000)
• #12870 - Fix publicPath problem in legacy build (@ahocevar)
• #12889 - Simplified ESLint config (@tschaub)
• #12875 - Only trigger change event if animating a tile transition (@tschaub)
• #12885 - Fix typeDefs for several Control modules (@MatthijsBon)
• #12861 - Update geotiff to 1.0.8; allow version range (@ahocevar)
• #12865 - Add a note about installing git before using create-ol-app (@tschaub)
• #12847 - Add more definitions for GeoTIFF types (@tschaub)
• #12850 - Fix issues with animate on View without center or resolution (@MoonE)
• #12846 - Use nodata values in the GeoTIFF headers for fill value (@tschaub)
• #12837 - forEachLayerAtPixel return null for unsupported layer types (@mike-000)
• #12836 - Support a normalize option on the GeoTIFF source (@tschaub)
• #12646 - Support for hit detection in styles with custom rendering (@ashchurova)
• #12831 - Fix rendering VectorImage with no features in view extent (@MoonE)
• #12830 - bugfix: Fix type of layers option in OverviewMap (@ejn)
• #12815 - Spelling correction (@tschaub)
• #12812 - Release v6.8.1 (@openlayers)