Could I edit or assign several shifts at the same time?
You can assign or do some changes at the same time on multiple shifts in Schedule by using 'Edit multiple shifts' function. You can find this function in the Schedule view (press on any day to open the daily view).
Select a period and the shifts you would like to change and press on 'Edit selected shifts'.
In the new window you will be able to change the data you would like to update and press 'Update' button to make changes. Only the selected data will be changed