Rearranging fields
You can rearrange the fields that are in the Main, Security, and Extension Tables tabs. Drag and drop the fields above and below one another or move them to empty cells within the grid.
If you try to overlay another field, the field that you are overlaying is returned to the list of available fields in the left pane. Suppose you have two fields in the right pane, in two columns. You try to reverse the position of those fields. In this case, one of the fields is removed from the grid and returned to the list of available fields.
You can also designate whether fields should span two columns and whether fields are read-only.