Final answer:
The window to change clip duration in editing software is called the timeline or trimmer, but the provided information refers to graphing utilities, where the WINDOW key is used to adjust the graph's viewing window by setting Xmin, Xmax, Ymin, and Ymax.
Step-by-step explanation:
The window where you can change the duration of a clip, particularly in video editing software, is typically called the timeline or the trimmer. However, the information provided about changing the viewing window seems to refer to a process using a graphing utility where you adjust the viewing parameters of a graph.
For graphing calculators or applications, if you want to change the viewing window to adjust how graphs are displayed, you would typically press the WINDOW key. Then, you enter your desired window settings including Xmin, Xmax, Ymin, and Ymax to define the minimum and maximum bounds of the x-axis and y-axis.