View>Active Fonts Panel

I have a question re the “eye” showing a red circle with slash (see attached). I am able to toggle between views but not sure why the “eye” shows the red circle-slash?

Thank you.

Irene
Maintype8 Pro-Active Fonts (eye)-View2.JPG
Maintype8 Pro-Active Fonts (eye)-View1.JPG

Presumably it just means: view/don’t view the preview.

We just couldn’t find a more appropriate icon.

Thank you so much for the explanation.

Irene