Enumeration of Power Set

order first by cardinality (set size)
within cardinality, order by alphabetical order 
{a},{b},{c},{ab},{ac},{bc},{abc}

very long linear list
wrap scanline-style, at a fixed width
128 columns, millions of rows

with conventional display, couldn't see anything
everything smaller than a pixel

with guaranteed visibility, marks are visible
construct hierarchical grid on the fly
add and delete SplitLines as needed
empty rows collapsed 

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