The Group By option determines if the report is grouped and displays sub-totals for that group. When set to the None option, sub totals by group are not displayed.
Group By options differ by report where the Group By option is available.
Note: Since Keystroke can track up to four Vendors per Inventory Item, depending on the report being run, and what other report options are selected, some items my be printed more than once if the report is grouped by Vendor; possibly resulting in inflated Grand Totals at the end of the report.
See:
Report Manager Contents