this on the master slide, and set it to "jump to next slide" then on slide level cover it with a transparent object that can submit the slide. however, it may be easier to just copy/paste the custom button from slide to slide.
yes i don’t want to use the feature because it adds the thick bar on the player frame. i have just made a question slide and duplicated it with my custom submit button.
glad you have found an option for your needs. 