Read postmeta_form_limit | Hook (developer.wordpress.org)
Filters the number of custom fields to retrieve for the drop-down in the Custom Fields meta box.

I’ve always wanted to fix this on my site…

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Chris Aldrich

I'm a biomedical and electrical engineer with interests in information theory, complexity, evolution, genetics, signal processing, theoretical mathematics, and big history. I'm also a talent manager-producer-publisher in the entertainment industry with expertise in representation, distribution, finance, production, content delivery, and new media.

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