How does scrolling capture in SnagIt work?
A scrolling capture operation is commonly used when you want to create a screenshot of an entire website or for something that doesn't fit in one image and needs scrolling. Of course, you can create a scrolling capture effect using the built-in feature from SnagIt or simply create many pictures and then combine them one next to each other.
There is also a tutorial for you to see how the function works in action: https://www.techsmith.com/tutorial-snagit-custom-scroll.html