I'm not sure if this is the 'official' method, but this is how I create an inner glow to shapes: Create the shape you want to give an inner glow to; remove the fill (i.e., make it transparent); clone the shape (Ctrl-K); apply a shadow to the cloned shape in the shadow tool and set it to 'Glow' (and modify to your liking); select both shapes and select Arrange/Apply Clipview.