"agenda" format
A narrow book format, i.e., one where the height
of the book is disproportionately greater than its
width, to the extent of 3 :1 or greater, as
compared with the usual ratio of 2:1 or 3:2. The
"agenda" format proportions are similar to those
of the consular diptych. The diptych was often
adapted in the middle ages for use as covers of
ceremonial lists and processional music, which had
to be written in a format to conform with these
constrictions; the "agenda" possibly stems from
that format. (347 )
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