alternate anchor angles arc at atomic background bezier bidirectional bitmap bold bottom bus bus_entry center circle clock clock_low color comment company dash dash_dot data date dot edge_clock_high effects end extends fill font global_label hide hierarchical_label hint_alt_swap hint_pin_swap id image input input_low instances inverted inverted_clock italic junction justify kicad_sch kicad_symbol_lib label left length lib_id line mid mirror name no_connect non_logic none number offset open_collector open_emitter outline output_low unconnected output page passive path pin pin_del pin_names pin_numbers pin_merge pin_rename polyline portrait power power_in power_out property property_del pts radius rectangle reference required rev right scale shape sheet size solid start stroke symbol text thickness title title_block top tri_state type unit unspecified uuid version width wire xy x y