To be more efficient, use keyboard shortcuts to build and modify your schedule.
Hold down the first key and click on the 2nd.
Cmd + A: To select all shifts of the schedule.
Cmd + C : To copy the selection.
Cmd + V : To paste the selection in a new week.
To copy and paste, only some required shifts :
Cmd + curseur : To select only required shifts.
Filters can be selected using arrow keys when the dropdown is open :