The criteria specified in TBDY 2018 Article 7.3.8 are applied to the column selected with the Set Short Columns command.
Location of Set Short Columns Command
You can access it from the ribbon menu Modify tab under the Entity Edit heading.
Select the column or columns you want to set as short columns.
Click on the set short columns icon.
In the short column dialog that opens, "Use selected columns as short columns." check the option.
Click the OK button to close the dialog.
The criteria specified in TBDY 2018 Article 7.3.8 will be applied to the column or columns you have chosen.