How to search previews?

[Hex4dec]

I'm trying to make a makeshift manpage searcher and one thing I would like is to search the manpage contents in combination with the names. I'm currently using man -k . | awk '{print $1.$2}' | fzf --preview 'man {}'.

[junegunn]

You can't. As the name implies, preview feature is for previewing the content of the current item. If we want to make the preview output searchable, fzf should execute the preview command with every item in the input list, and it's going to be incredibly slow.

[Hex4dec]

I mean, it should at least be allowed..

[junegunn]

No. It's just beyond the scope of the feature.