Applies the percentage of reflectivity to the picture displayed over the button surface.
The value of this property can range from 0 (no reflectivity applied) to a value of 100 (maximum reflectivity). Lower or higher values will be automatically capped to the nearest valid value. The default value is 50.
Below you can see two buttons: the left one has a picture whose PictureReflectivityPerc property is set to 30, the right one has a picture whose PictureReflectivityPerc property is set to 100.
This property has no effect if the PictureReflectivityEnabled property is set to FALSE.
In order to perform changes to Pictures and Animations settings at Design-time take a look to the How to display bitmaps and animations section.