The Purchase Order and Receiving menus can be changed to suit your tastes. The actual placement or inclusion of menu options is not critical within the menu. The minimum set of options required by the Purchase Order system are:
Non-Inventory Purchase Orders
Non-Inventory Receiving Slips
This is the minimum set of menu options that still allows the Purchase Order system to operate properly.
You can freely change the prompts of the menu options. Doing so does require changing the Purchase Order system menu help files files, but this is not a difficult task. You can also change the parameter prompts of reports by altering the report parameter screens, but you should be careful about removing prompts. Also, adding report prompts without changing the report to use the new values, has no effect on the report output.