To download a portion of the archive first you need to create a clip to specify the start and end times of the clip that you wish to download. To start creating a clip select a camera and click on the Clip button on the bottom toolbar or use a keyboard shortcut by pressing the "C" button twice to create a clip or by pressing "C" followed by "T" buttons to create a new timelapse.
Next, select the desired start and end times for your clip. The shortest clip you can create is 30 seconds and the longest is 1 hour, for the timelapse minimum duration is 2 hours and the maximum is 48 hours.
There are two ways to set start and end times for your clip:
1. Drag the start and stop handles on the timeline:
2. Use the calendar to set times:
After the clips start and ends time were set click the Save button and create a name for your clip. The clip will be stored in the Library and can be downloaded from there.
To access your clips open the Library from the Top menubar and search for the clip. Clips are arranged in chronological order based on the footage's time.
To learn more about the functionality of the Library menu please visit this page