Short dates are a space saving feature in the Mac genealogy software, Reunion 9. They consist of two dates separated by a dash. Short dates appear below the parent buttons on the family card (see the image below) and can be included in charts and reports.
The short dates on the family card can be set to either the full date or just the year. This setting can be found on the appearance preference panel.
There are name options on some charts and reports that combine a name and short dates. Choosing one of these options enables you to conserve space vertically by replacing two lines of data (name and dates) with one. This option is in the “Name Setup” layout setting for pedigree, descendant, and relative charts as well as descendant reports. This video from the MacGenealogist Archives: Short Dates in Macintosh Genealogy Software Reunion 9 for Mac, will take you step-by-step through using short dates to conserve space in a relative chart.