If you'd like to set up weekday and weekend menu separately, please refer to the following steps and modify on iPad :
Click Settings > Food Order Management > + Add
Enter the module's name, etc : Weekday > Tick each of the day Mon-Fri > press Done
Press Order item capacity control of Weekday module
Enable the items that you want on Weekday module > press Done to save
For Weekend menus, simply do it again, this time select Sat & Sun in the module.