We have a need to be able to merge an attachment by selecting multiple entries at once and merging. I know we can copy the attachment 5 times and click and drag on top of each of the 5 different documents and merge one by one. In some cases, we could end up with 100 of these. It would be very tie consuming to copy the attachment 100 times then drag over the main documents 100 times.  For auditing reasons, we cannot use the document link. How can we select multiples at a time and apply the attachment to all of them?

We are using Laserfiche Rio 10.3

Example: