You can add attributes for a product, if attributes are not already added by the product’s family.
In the product edit form :
Click on the add attributes button.
Choose attributes you want to add for the product by clicking on their labels.
You can search an attribute by its label by using the quick search box in the box.
You can select all attributes of a group by clicking on the group label.
Click on the add button in the box.
Attributes are added for the current product only.
These attributes can be removed by clicking on Remove (‘X’) button at the right-hand of the attribute.