Show on Blog Index

Hello Everyone!

I am still trying to convert my old Sparkle site to the new one including the use of the blog feature. Anyway, I am figuring things out particularly slowly but I think getting there.

This evening I decided to include the blog feature photo on the index page as I had previously unticked “show on blog index” on the features tab. However, the box was faded out and I could not at all figure out what to do. Is there something I did wrong or need to do in order to tick the box? I got so frustrated, I deleted the blog and started again. It’s okay now but in case it happens again, could someone please help?

Many thanks!