-- deallocate server images, etc. on termination
-- support for multiple visuals
-- support for true BW images
-- movable canvas zoom window, scale/size determined by drag button
-- arrow key movement of canvas cursor
-- add .Xdefaults functionality (resource class Xrastool)
-- color backdrops
-- sort colors for use with Cutoff scaling option
-- prettier icons
-- improved out-of-memory error handling
