There are 3 commonly used ways to apply effects in Darkroom Booth. In this video Eugene briefly explains all 3 and shows you how to set them up and use them effectively in your photo booth.
For more detailed instruction on adding and customizing buttons in your screen templates check out this Help Center Article.
https://support.darkroomsoftware.com/portal/en/kb/articles/adding-buttons-to-a-screen-template
See this Help Center article for more information on using Photoshop Droplets.
https://support.darkroomsoftware.com/portal/en/kb/articles/adding-buttons-to-a-screen-template
For more info and videos like this one, please visit www.DarkroomSupport.com