Manually selecting a record by entering its key in a form adds that record to the current selection set. But using search, replaces any previously selected records.
For example. In Part Maintenance, I enter CB-0001 and hit tab, then do the same for CB-0002, CB-0006, and CB-0010. I can quick switch between any of these records using the navigation tool.

But if I needed to go to another Part whose PartNum I wasn’t sure of, I’d use the search. Say I search and find it is CB-0105. If I select that and hit OK, Part CB-0105 is now loaded. But the previous Parts are removed…

This also happens when selecting records on a filter tab in a report form.
If I wanted a report to just include specific records, and I use the Search button, then any previously selected records are removed. if you go through the serach results and use CTRL to add records, but missed one, then you have to re-select all the ones you want again.
Or at least make it an option in the Search box
