Please provide this feature -- it is extremely awkward and time consuming to work around the current limitations, especially as printers get larger and capable of printing more objects at a time. (I have some print batches that include more than 50 small objects which require sequential printing!)
Since I use a round print bed on one of my printers (a delta), I often need to arrange multiple objects in a circular pattern. Since S3D doesn't currently provide this option, I do it in my modeling program and import the multi-object pattern as a single STL file.
Then I use the "separate connected surfaces" feature (in the Mesh menu) to create individual parts in S3D. I then need to create individual processes for each part, and make sure the processes are in the correct order to avoid print head collisions during sequential printing.
To make this less of an ordeal, I would suggest S3D should:
1. Allow sequential printing without requiring a duplicate process (or group of processes) for each object;
2. Provide an intuitive means of specifying object print order, for example by dragging object names up or down the list in the "select models" dialog box.