Apparently already suggested, but not there yet.
It would really speed up adding multiple purchases.
PLEASE DON'T THINK THIS IS A REQUEST FOR THE COPY FUNCTION. The copy function is only useful if the batch of invoices being processed is for the same customer or supplier. The point we are all trying to make is: we almost always process batches of purchases or sales invoices from/to numerous suppliers/customers. The copy function DOES NOT IMPROVE THIS WORKFLOW
See also this idea and numerous others
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