layout scopes page-number is-last-bookpart is-bookpart-last-page)
"Read variables @var{what-odd}, @var{what-even} from @var{layout},
and interpret them as markup. The @var{props} argument will include
layout scopes page-number is-last-bookpart is-bookpart-last-page)
"Read variables @var{what-odd}, @var{what-even} from @var{layout},
and interpret them as markup. The @var{props} argument will include