You can move your subtable field to the front or the last by dragging it horizontally and dropping it at where you want it to be.
Moving subtables to another row can be done in the design mode by dragging your subtable field into an empty cell.
First make sure that you have enough space (3 cells beneath your subtable field headers (these will expand in your form in editing mode later).
You can drag one of your subtable fields to an empty space on your form to start the process.
Ragic will show you a prompt, asking if you want to move your subtable. Select the cell that you would like your first subtable field (the leftmost) would go to.
Ragic will move your entire subtable upon confirming.