"Merge Documents" for non-consecutive files

If I want to use the context menu to “Merge” documents sometimes I would like to merge documents which are not next to one another in the sort order of my list.

Some software lets you select non-consecutive files with Ctrl instead of Shift, but that does not seem to work in DT3.

Is there any way to select files for merging which are not consecutive some way other than manually re-sorting the list?

Press command and select each record.