To link shifts week to week you must first enable the option on the schedule type.
Click on Site Setup or Department Setup - Schedule Types
Click on the Edit Pencil beside the schedule type you will be adding recurring shifts to
Tick the Uses Recurring Shifts and save by clicking Update it
Once you're enabled the option to create recurring schedules you can create your template schedule to copy forward week to week.
Go to Manage Schedules - Schedules
Create your template schedule
Build your template schedule and copy forward
Choose Yes, continue the set under the Continue Schedule Set from XX (XX=name of copied schedule)
Copied schedules and shifts will have a chain link icon beside them