When you have an old oscilloscope that only can do print out or you want your printed graph to be digitalized. It is always being very difficult to complete the task using such a software package like 'UNxxxx'. Sliding the bar will act like a filter to cut out some unnecessary points.
Eraser is a multi edges cuter.
The 'Fun' button is a function inputer. This is the photoconductivity transient measurement about a novel GAInNAS Sample biased at certain voltage.