You can Import any previous week "as is" by choosing that date in the Import window or you can create and save certain weekly schedule "templates" (Ex. if you want to create a holiday schedule and save/name it as a template). You can save any schedule that you have on the screen or you can navigate to an empty week (future or past) and create a schedule and save it as a template. When you are finished creating the template, click Save Template and name it. If you used an empty week to create the template, be sure to then use the Clear/Delete function to "Erase the Entire Schedule" - removing the shifts from that week to set it back to empty after saving as a template.
Note that when saving or importing templates, you can first filter your view to only include a specific Position, Category, or Group so that the template will only include those shifts.
(Ex: filter the schedule to only include shifts for one position and then "Save as Template" to create a template that includes only the shifts for that position).