Requantize Sub-Menu

set_input	Specifies input grayscale image
set_filter	Specifies error filter image
set_output	Specifies output halftone image
anneal	Requant image at specified temperature
descend	Requant the entire image
migrate	Migrate the pixels
tweak	Tweak at one pixel
quadtree	Quadtree dither algorithm
scan	Select scanning pattern
setup_error	Initialize error and filtered error
setup_images	Setup internal images
quit	exits the sub-menu
??	Lists the builtin commands
?	Prints this menu