drag and drop what?
Files from outside of FileMaker into container fields?
Data selected in one field into a different field?
Drag and drop for files is readily possible if the resulting type of insertion is appropriate for what you need.
Drag and drop from one field to another is controlled in a preferences setting you can select to enable this feature.
Consider a screen as having areas of information - let's say four quadrants. I have records that are represented by a graphic object - let's say a rectangle. I want to drag that rectangle from one quadrant to another just like i would drag a file folder to move it from one directory to another.
If the graphic object is in a container field and you want to drag it to another container field on the layout, this can be done.