If there is a need or desire to manually assign shifts for particular days of the week (i.e. Sat and Sun), that can be accomplished by checking the "Manually Assign Shifts" check box at the top of day column on the "Shifts" page for those particular days.
Those days for which the "Manually Assign Shifts" check box has been checked will not have their shifts automatically assigned by the system. All shifts for those days will be set to "Not,Assigned".
The admin may then manually assign the "Not,Assigned" shifts or leave them available for roster members to reserve.
Setting aside shifts for manual assignment by this method will allow the system to assign remaining shifts in a more equitable fashion than if shifts to be manually assigned were excluded for each roster member in the roster editing process.