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#### 3.4.1.4.2 Duration Info Box

Figure 3.19: Duration Info Box shows the duration, starttime, and endtime of a time region marked by a pair of green lines.

The Duration Info Box is created by right dragging in the timeline canvas or the time ruler canvas to mark a region in time. The dragged region will be marked by a pair of green lines and is lightly shaded as well. The Duration Info Box can serve a marker to facilitate the process of zooming in and out. The information provided by Duration Info Box can also be used to compare different durations or to measure the total duration of a collection of subroutine calls. For instance, in Figure 3.19, the Duration Info Box marks all consecutive green states on the fifth timelines. The Duration Info Box says the total duration of the nine green states is about 1.74 msec.

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