Are you inside the Roku Channel/app or another Channel/app? If inside the Roku Channel, you have to navigate to the Continue Watching section and then highlight the selection (show or movie tile) first before pressing * button. If you look at top of screen to the right, you should see Roku | Options * become available (change color/brighten) whenever the * button can be used.
If you are not inside the Roku Channel, there may be (and likely is) a different way. Different Channels, different methods. Post back with Channel and someone should be able to help.
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102