Using Default Order
You can reorder the field list on the Order tab so that the logical control order reflects the physical control order as shown on the Layout tab. Do so by selecting You can use this tool in either the Layout or Order view for your page definition. The system creates the default order by reading the page as though it was on a pixel-by-pixel grid, from top to bottom and left to right.
Note:
Use the default ordering option sparingly on existing pages. It may offset any previous order that was created. However, on new pages, you may find default ordering a useful starting point for your control order list.