When you open a Sales Order you can click at More to pin its products to the clipboard, like so:

Then, when you click the button to add a Work Order instead of filling in the information in the 4 fields manually you can just fill in the location and open the Clipboard (bottom left). If you click at Paste there, multiple Work Orders will be created - one for each item in the Clipboard

Note, there are some limitations in this feature at the moment:
a. you need to ensure that all the products to be pasted from the clipboard are of type 'Manufacture from Work Order' or 'Buy From Supplier or Manufacture From Work Order'
b. you will not be able to create any associated Work Orders if a pasted finished good requires multiple levels of production 

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