Start Point of Sale opens the POS Grid for transaction 
processing. When the user clicks on "Start Point of Sale" a 
"Shift ID" will be created with the defined float. Users with role "Cashier" 
will enter the POS Grid at login.
Shift has below rules:
  - 
A new "Shift ID" will be created for a user 
  if all previous shift have status as "Closed/Hold".
   - 
"Shift ID" is generated based on 
  the "Default Location" of the POS station. For example,
  
  - 
If Users 1 logs into "POS Station 1" where 
    the  "Default Location" is "Main" a "Shift ID" will be created.
   - 
If Users 1 logs into "POS Station 16" where 
    the  "Default Location" is "Retail" a "Shift ID" will be created.
     
   - 
If a shift is initiated and not closed, user will 
    log into the same "Shift ID" for  a location.
    
   - 
Users will not able able to process further 
  transactions in a shift once it is set to "HOLD".
 
Notes
  - 
Shift number sequence is 
  set under "Configuration".
   - 
The "Default Location" must be configured to allow 
  transaction processing. This is set under "Configuration => General 
  Settings 1".