Is there a way to force reply a slideshow after it is done?
You can check the Loop option as diplayed in the image below.
Is there a way to do this when they click a button?
You can make a MSO with the slideshow in one state and the image on the other state.
Give the button the action of go to state and switch to the state with the slideshow set to autoplay and loop.
Europe, Middle East and Africa