Allow drag and drop additions/changes to POs.

Digital Retail Solutions offers a product called PowerOps that will give you that option and a LOT more features besides -- I couldn't see using RMS without PowerOps, frankly. From the Power Ops help file regarding the Carry Forward feature (and there are like a skajillion other features it has):

Carry Forward allows you to close a partial PO and move the outstanding backordered items to a new PO. If your business routinely places pre-season or program orders on a single purchase order, this feature allows you to reconcile incoming invoices from suppliers that include items shipped to date.

You can only carry forward partial purchase orders and will receive this warning for other PO types.

The partial PO must also contain received items that have been committed (versus pending). Otherwise you will receive this warning. If the selected PO meets requirements, you will be presented with three options.

PO Number -- defaults to the original PO number appended with -01, or -02,

-03, etc. on subsequent runs if the same PO is carried forward again.

Include Inactive items -- uncheck this checkbox to prevent items that have been marked Inactive from appearing on the new PO.

Use current Description, SRN, and Cost -- when this checkbox is enabled any changes made to items on file will be updated to the new PO; if disabled the original PO content will be used.

Click Carry Forward to proceed. If successful, a confirmation box will appear.