That if you want to cancel an item by code when you are using the cash register, you can just press Ctrl+C to activate the command, and then enter the product code in the input box and press ENTER?  This will remove the product from the current transaction.
That you can see the total sold today whithout leaving the cash register?  You can just press Ctrl+T or select fromt he menu.  The total sold today will be displayed in a little box.
That if you are having problem remembering a product name or code, you can use the reference system and retrieve information about a specific item?
That you can see all the products you sold today without having to spend paper printing a long report?  Just go to "Products Sold Today" from the main form and check the total sold, the number of products sold, and the name and code of all products sold.
That you can easily change the job title of one employee?  From the main form, go to "Employee List" and enter the SS# of the employee you want to update, and press "SHOW".  Once the information is displayed, you can change the desired fields and press "UPDATE".  Don't forget to assign a password, if you are changing this person to be a cashier. 
That you do not have to spend paper printing a long receipt of a single product?  Just enter the product quantity in the quantity box, this will spare you from keeping pressing enter 10 times, if you want to sell 10 products.  You can just the 10 in the quantity box and the system will do the rest.  This will also enable your client to be efficiently served.
That if a customer give up a sale after you have pressed "END" you will have to reenter the product back to the database manually?  To aoid this, make sure taht the customer agrees with the total before pressing "END".  If it's necessary, cancel item by item using the cancel menu ofered by the cash register before you press "END".
That you have to have a password and a system usage in order to access certain parts of this system?  You can ask the manager to assign you a password, if you want to have access to the protected features.
That you can activate the Help System by pressing F1 or simply by pressing "Help"?
That you can easily see how your sales are going by analyzing the graphs ofered by this system?  There are three graphs categories.  Press on "Sales Analysis" to check them out.
That you can change your tax rate easity through the update system?  Go to "Products" and from there select "Return/Update Products" and right on top select "Change Tax Rate", enter the percentage and press ENTER. 
That you have to sychronize your database every time you close for the day?  This will save you lots of headaches case your system crashes.
