To specify a default choice among the available options for an attribute.
Procedure
1. Locate the field labeled with the name of the attribute (for example, "Color" or "Size").
2. Click on the selection field area. This field might initially display placeholder text.
3. The dropdown list containing all accepted values will open.
4. Click on the value you wish to select.
5. The chosen value will be displayed in the field, confirming the selection.
