Most basic cash registers will allow you to use clerks. A clerk is any member of staff that operates the cash register. To use clerks your till will require some basic programming, on some cash registers you will be able to name clerks and enter the operator type.
If you wish to use clerks it is important to make sure the till you are looking at has the capacity to hold enough clerks. A basic till may only have 8 clerks and with an EPoS system you could potentially store hundreds of clerks.
With clerks activated, you should be able to pull a clerk report from the machine. This will show you how many sales each member of staff has made. If you have a machine with an electronic journal function you could monitor your clerk usage further and see how many times they have opened the draw or view what they have put through the till during an individual sale. This can be useful if you have any discrepancies as it can be viewed at any time of day without resetting your end of day Z reports.
The use of clerks will slow down transaction time as sign on will be required with every sale but it will help you to monitor sales and operator use closely.
Clerk interrupt can be a very useful function when using clerks, with this switched on clerk 1 can put their current sale on hold, perhaps whilst serving drinks and during this time clerk 2 is able to use the till to enter another sale. This can be very useful in a busy restaurant or bar.
With the use of clerks security levels can be heightened and log in times can be vastly improved.