The Guide introduces the Glow and Soft edge effects, but no such options in the Sidebar of Writer 24.2 after a graphic object is opened and selected.
Draw a shape and with it selected look at Properties - Effect.
Thanks, ilmari!
Indeed!
But why is it not working by selecting just a graphic from inside the Guide…? An image of an options dialog, for example!
The Glow and Soft edge effects are for Drawing Objects, not graphics/images.