The 
Sorting button on the Hierarchy ribbon tab.
The Sorting item in the dimension element's context menu or in the drop-down menu of the 
Settings button located below the dimension name in the Selection group of tabs on the side panel.
Sorting elements is available in regular reports in the desktop application, express reports, dashboards,
To sort dimension elements displayed in the Selection group of tabs on the side panel, select sorting method in the drop-down menu of:
The Sorting button on the Hierarchy ribbon tab.
The Sorting item in the dimension element's context menu or in the drop-down menu of the Settings button located below the dimension name in the Selection group of tabs on the side panel.
Sorting options:
Ascending.
Descending.
By attribute. Select a dimension attribute to sort by in the drop-down list.
The order of dimension elements is applied only to hierarchy of the dimension displayed on the side panel and is not saved with the report.
IMPORTANT. The order of dimension elements in the table is not synchronized with the order of dimension elements on the side panel. For details about setting up order of dimension elements in table see the Sorting section.
To show dimension elements with default sorting, select the Reset item.
See also:
Working with Dimension Elements