It has been several years since the feature of gesture controls was added to the smart displays. If you hold up your hand with your palm facing the camera, you will be able to stop the timer.
If you don't want to shout or touch the screen to stop the timer, you can use it.
Hopefully, it will lead to more gesture controls, such as to play or pause a song or video. The second-gen Nest Hub has all of those gestures. The latter uses a radar sensor to see your hand movements.
Go to the device settings menu of your Show 10 or 8 and select "Gestures."
Along with the Gestures capability, Amazon also announced some other accessibility features for the Show line: Consolidated Captions, a quick way to turn on three caption features in one go on all your Echo Show devices.
Text to Speech is being added to its displays. Text to Speech allows you to type out a phrase on the screen and have the Assistant speak it out loud. The purpose of this is to help people with speech disabilities. Fire tablets have the Text to Speech.