print.seqlengths
logical, whether to display sequence lengths below
the main output listing (e.g, chromsomes). Usually tidier when this is FALSE.
...
hidden arguments including: 'head.tail'; number of SNPs to display
at start/end (only the head and tail are shown as these objects are generally
very large with >100K SNPs); 'up.to'; only SNPs at the start and end are generally
displayed, however this parameter specifies that when there are