Search Help: Purchasing Document Number 
Usage
This process shows you how to find the number of a purchasing document.
The search begins on the current screen. However, you can generally search using the possible entries help in the relevant field, irrespective of the R/3 screen you are using.
Procedure
In the dialog box, you can choose the type of search help.

Alternatively, you could click on the icon to the right of the scroll arrows. This calls up a dialog box, which lists the existing tab pages. Choose the name of the tab page you require. This then appears in the dialog box.

You can also use the possible entries help in several fields in the tab pages. You can perform a detailed search.
.The dialog box lists the results of your search.
.The purchasing document number is then automatically entered in the relevant item on the initial screen.