@var{design-size-alist} is a list of @code{(rounded . designsize)}.
@code{rounded} is a suffix for font filenames, while @code{designsize}
should be the actual design size. The latter is used for text fonts
-loaded through pango/fontconfig.
+loaded through pango/@/fontconfig.
@item
@var{factor} is a size factor relative to the default size that is being