The settings on the Entries tab up to the Sort
field correspond to the settings for a
selection list.
Since users can change the entries in the sortable list however they
like, the current order must correspondingly be saved. To do so, select
a field of data type Integer in the Sort
field list.
Please do not use as sort field an existing field in your
application to which you have already saved data. This data would be
overwritten during a sorting process in the list with the value of the
sorting order.