From the Requisitions window, use the Supplier Item Catalog window and Requisition Templates to create requisitions more easily.
Please check set up @
http://www.oracleug.com/user-guide/purchasing-overview/requisition-templates

To use requisition templates to enter requisitions:

1. Navigate to the Requisitions window by selecting Requisitions from the menu.
2. Enter requisition header information.
3. Navigate to the Items tabbed region.
4. Select Catalog to open the Search Supplier Item Catalog window.
5. Select the desired Requisition Template from the list of values.
6. Choose the Find button to open the Supplier Item Catalog window and display the template lines.
7. Copy the desired lines to the Order Pad.
8. Choose the Select button to close the Supplier Item Catalog window and transfer the order pad lines to the requisition.
9. Save your work.