When designing a user flow, we may position each screen (frame) side by side. At some point, we may need to remove some screens (eg reject an alternative design, reorder framers etc). Closing the resultant gap takes manual effort: zoom out, grab a load of screens, drag/shift over.
It would be useful to be able to right-click in the gap and select ‘Close gap’, and all frames to the right are shifted to close the gap (maintaining consistent margins).