[chaley]

Originally Posted by ownedbycats

program:

	if
			$#currentlyread anding 
		&& 
			approximate_formats()=='PAPERBOOK'
	then
		'invis.png'
	fi

Works only if PAPERBOOK is the only format. Should I be using formats_path() or something else instead?

approximate_formats() returns a comma-separated list. Try

'^PAPERBOOK$' inlist approximate_formats()