The visitor list can be sorted based on any of the included columns.
In order to sort a list, left-click on the header of the corresponding column (1). Repeat clicking will cause backward sorting. The green strip below the column header (2) shows based on which column the sorting was carried out. The triangular arrow above this strip shows the direction of the current sorting.
Almost columns of the list are sorted based on lexographic comparison, or in alphabetic order. The exception are the columns dedicated to the chat status and the direction of the last message in chat.