I'm not sure what I am doing wrong. Typically, the range I select on the timeline is shorter in duration than the video clip I have selected in the Media Pool. If I select an in and out point in the Source monitor (4 point edit) the speed of the clip is adjusted when it is moved to the timeline using the Overwrite button. Because my Program range is shorter than my Source range, the video runs faster. This is as expected.
In a 3 point edit, I set a range on the Timeline (Program Monitor) and in the Source monitor I select only the begin point. Rather than trim the Source video to fit the timeline range, the program will adjust the speed of the video to fit the range in the same fashion as a 4 point edit. For a 3 point edit I want the system to trim the clip rather than adjust its speed.