Clicking Edit in the Actions column at attribute setup does not allow you to add values to attributes; use the Add Attribute Value command.
To add values to attributes
1. On the Manager product attributes page, click Add Attribute (System Setup > Set up commerce web components > Manage product attributes).
The Attribute Setup page is displayed.
2. Click Add Attribute Value.
□ Enter the value name.
□ Click Add Attribute Value.
The new value should appear at the bottom the list of values at attribute setup.