Add No-Index, No-Follow to Values of Attributes in Improved Layered Navigation

Add No-Index, No-Follow to Values of Attributes in Improved Layered Navigation

Hello, 

Last week I asked a question and I received very useful help. My question was about how to fix the No-Index, No-Follow for specific categories in the Improved Layered Navigation. However, a new question did pop-up when working in Amasty. 

How can I set the No-Index, No-Follow attribute for values of my attribute? Because I want some filter options to be indexed and other filter options to be not-indexed. 



As you can see in the above screenshot, I can choose the 'Robots' filter at the top of the settings panel. Although, when selecting the robots setting, I can only choose the following options: 



But how can I manage that I want to index the attribute and not index one of the underlaying Attribute Values. I hope someone can help me out. 

Thanks in regard!