This article outlines how to change the countdown time between photos in Snappic, if you wish to change the initial countdown see here.
Firstly, go to the specific template on the event by clicking the "Edit" button on that section. See below.
Photo Template
If you want to change the interval on a photo template click the "Edit" button under the frame template, as shown below. Remember this can only be configured on photo templates that have at least 2 or more photos.
This will open up a pop-up where you can adjust the interval countdown.
GIF
If you want to change the interval on a GIF template click the "Time" icon/button on the GIF template as shown below.
This will open up a pop-up where you can adjust the interval countdown.
Animated Overlay
If you want to change the interval on an animated overlay template, then you can click the "Edit" button under the template.
Now you can set the capture interval.