Gets or sets whether the hover images feature is enabled. This is a dependency property.
true to enable the hover images feature; otherwise, false.
If the AllowHoverImages property is set to true, images that are displayed within gallery items are enlarged while the mouse pointer hovers over them. The size of hover images is specified by the Gallery.HoverGlyphSize property.
A custom hover image can be specified via the GalleryItem.HoverGlyph property. This image is displayed when the mouse pointer hovers over the item. If the hover image isn't specified, the item's image which is specified by the GalleryItem.Glyph property is enlarged.