To modify an existing invoice's details:-
First you will need to open the Invoice form.
This can be done by choosing one of the following methods:
•Click on the 
toolbar button or
•Select Forms->Invoices from the drop-down menus or
•Click on the 
icon on the left-hand browser pane of your database form.
Select the invoice you wish to modify from the Invoice Browser.
Make the desired alterations in the invoice form.
Save any changes you have made by using one of the following methods:
•Click on the 
toolbar button or
•Select Record->Save from the drop-down menus or
•Hit the F9 shortcut key.
If you make changes to an invoice and don't want to keep them you can use the 
reset button. This can only be used before you have clicked the Save button.
OR
If you make changes to an invoice and don't select the Save button you will be asked when closing down that window, if you wish to save or not.
When saving a new invoice, the update ingredient costs dialog appears and asks if you would like to update ingredient costs.
NOTE 1: If you have the AutoSave facility enabled, Resort Hotel will not show any prompts but will automatically save any changes that you have made.
NOTE 2: To cater for suppliers recycling invoice numbers, the program allows you to enter the same invoice number more than once for the same supplier. Take care you don't enter the same invoice twice.