Not sure that I understand the question
In drop mode you will see all the fields in that subfile record.
So you need to build all the fields that you want into that subfile record
and load all those fields when you load the record.
There is nothing you can do in RPG after the exfmt to do what you’re asking for
The drop/fold doesn’t return to rpg until an active function key or the enter key is pressed.
You can capture the fold/drop mode to determine how the screen looked when the user
Need something different. Forget drop/fold, use the function key to return to RPG
to load and display another record.
You could set it up to double click on the record to “drill down”